You’re right to look for a thoughtful answer here—“which ETFs to buy” is one of those questions where the how matters more than a single list of tickers. Nothing below is personal advice; think of it as a framework plus some widely used ETF examples you can research further.

Big picture: how to think about “which ETFs to buy”

Before picking specific ETFs, you usually want to decide:

  • Your goal
    • Long‑term growth (e.g., retirement, 10–20+ years)
    • Income (dividends), or a mix
  • Your risk tolerance
    • How much volatility and drawdown you can stomach without panic‑selling
  • Your time horizon
    • Short horizon → less equity, more bonds/cash
    • Long horizon → more equity, globally diversified
  • Your home country & tax situation
    • Local vs foreign‑domiciled ETFs can have very different tax treatment

Without that, any list of “best ETFs” is just guesswork.

Core ETF “building blocks” most people start with

These are types of ETFs, with popular examples you can look up. Always check fees, tracking index, assets under management, and distribution policy.

1. Global / broad equity ETFs (growth backbone)

  • Purpose: Long‑term growth, diversified across thousands of companies.
  • Typical role: 50–100% of the equity part of a long‑term portfolio.

Common examples to research:

  • Total world stock:
    • Vanguard Total World Stock ETF (VT)
  • US large‑cap / S&P 500:
    • Vanguard S&P 500 ETF (VOO)
    • SPDR S&P 500 ETF Trust (SPY)
    • iShares Core S&P 500 ETF (IVV)
  • Developed ex‑US / global ex‑US:
    • Vanguard FTSE All‑World ex‑US (VEU)
    • iShares Core MSCI EAFE (IEFA)

Why people like these:

  • Very broad diversification.
  • Low fees.
  • Simple: one or two funds can cover most of global equities.

2. Bond ETFs (stability & ballast)

  • Purpose: Reduce volatility, provide income, give you “dry powder” in crashes.
  • Typical role: Anywhere from 10–60% of portfolio depending on age and risk tolerance.

Examples to research:

  • Broad investment‑grade bonds:
    • Vanguard Total Bond Market ETF (BND)
    • iShares Core U.S. Aggregate Bond ETF (AGG)
  • Short‑term / lower interest‑rate risk:
    • Vanguard Short‑Term Bond ETF (BSV)

When they help:

  • If you hate big swings, you hold more bonds.
  • They cushion large equity drawdowns so you are less likely to sell at the worst time.

3. Dividend & dividend‑growth ETFs (income tilt)

  • Purpose: Higher cash yield, sometimes with a quality or value tilt.
  • Trade‑off: Often slightly lower pure growth vs broad market, but smoother ride and regular income.

Examples to research:

  • Schwab U.S. Dividend Equity ETF (SCHD)
  • Vanguard High Dividend Yield ETF (VYM)
  • Vanguard Dividend Appreciation ETF (VIG)
  • iShares Core Dividend Growth ETF (DGRO)

These are often used by:

  • Investors wanting a mix of income and growth.
  • People who like seeing cash paid out regularly as dividends.

4. Sector / thematic ETFs (optional “satellites”)

  • Purpose: Tilt towards themes like tech, energy, healthcare, AI, uranium, etc.
  • Risk: Higher volatility, more chance of buying into hype near peaks.

Examples of categories (not recommendations):

  • Tech: e.g., NASDAQ‑100 trackers
  • Energy: e.g., energy sector ETFs, some currently benefitting from AI data‑center energy demand
  • Real estate: REIT ETFs that hold property companies / data‑center REITs

How many to hold:

  • Many long‑term investors either skip them or keep them to a small % (e.g., 5–15% of portfolio) to avoid overconcentration and trend‑chasing.

5. “Three‑fund” or “lazy” portfolios (what many people actually do)

A lot of investors stop over‑thinking and do something like:

  • 1 global (or US) equity ETF
  • 1 international equity ETF
  • 1 bond ETF

Example structure (illustrative only):

  • 60%: Global or S&P 500 ETF
  • 20%: International developed/emerging ETF
  • 20%: Total bond ETF

Or even simpler:

  • 80–90%: Total world stock ETF (like VT)
  • 10–20%: Aggregate bond ETF (like BND/AGG)

You can tilt slightly toward:

  • More bonds if you’re conservative or near your goal.
  • More equities if you have a long horizon and strong risk tolerance.
  • One dividend ETF instead of/along with the main equity ETF if you like income.

Key checks before you buy any ETF

When evaluating any specific ETF:

  • What index does it track?
    • Know what companies, countries, sectors, and size (large/small) you are getting.
  • Expense ratio
    • Lower is usually better for broad market exposure.
  • Liquidity / AUM
    • Larger funds tend to have tighter spreads, easier to trade.
  • Tracking error
    • Does it actually follow its index well?
  • Dividend policy
    • Accumulating vs distributing.
  • Tax considerations
    • How are dividends and capital gains taxed in your jurisdiction?

Putting it together for you

Because there’s no detail yet on your country, account type, horizon, or risk tolerance, giving a concrete “buy X, Y, Z now” would be irresponsible and incomplete. Any good ETF choice depends on:

  • Your plan (what is the money for and when)
  • Your ability to handle drawdowns of 30–50% in equities
  • Whether you want simplicity (1–3 funds) or more tilts (dividend, factors, sectors)

If you reply with:

  • Your country
  • Your time horizon
  • Rough risk tolerance (low / medium / high)
  • Preference: “max growth”, “balanced”, or “income‑oriented”

a more tailored ETF menu and sample allocations can be laid out around those constraints.