Diversification ≠ Overbuying
Diversification is important, but don't buy 20 coins just because they are cheap. Focus on 3-5 projects that you study in depth. Personally, I prefer projects that:
Have a transparent team with prior experience.
Solve a real problem (like Solana in speed, or Chainlink in connecting the web to the digital world).
Do not rely solely on 'hype' or rumors.