Top 5 altcoins don't mean that they are all good.

The https://coinmarketcap.com/ shows the top 5 altcoins are (in order):
- Ripple
- Tether
- Chainlink
- Bitcoin Cash
- Litecoin

Ripple is totally centralized. Do you see its price chart?
Tether is centralized too and your Tether can be frozen under government requests. [UPDATED] PSA: Most Stablecoins Can Be Frozen, Even in Your Own Wallets
Chainlink: only a hype with DeFi
Bitcoin Cash: a shit scam fork from Bitcoin.
Litecoin: another fork from bitcoin.