I'd be honest and say the question shouldn't be "crypto or ETFs" but rather "how much crypto, if at all". The distinction matters: with ETFs, you know what you've got - a diversified portfolio with traceable value development. With crypto you're paying for volatility and hope, not a business model. That doesn't mean it's stupid, but it's fundamentally different.
If you're really interested, then only use money you can completely lose without it changing your life. Maybe 5% of your savings max, preferably less. Here's a practical trick most people don't do: buy your position all at once and then stop checking constantly. People often lose their nerve because they check daily and panic at dips. If you're going to get emotional about it anyway, you shouldn't bother starting.
Your friends who've done it probably only tell you about their gains - confirmation bias is real. ETFs are boring, but they work. At 28 you've got time for long-term thinking, and over many years ETFs almost always beat crypto. If you notice this stuff distracts you during the day or you're sleeping poorly, it's definitely not right for you.