1. Solana have a history of long slowdowns an crashes which makes it technically unreliable.
2. There is a lot of competitors within DeFi sphere that perform better.
3. The huge amount of coins comparing to Solana total supply was in FTX portfolio and it is possible that these coins gonna be sold on spot in order to provide compensation for FTX users.
4. Solana got shitty tokenomics. A large amount of supply was initially concentrated among a small number of users. They can easily dump the price because they bought it cheaper than it was sold on a public sale.

To be honest, it does not seem to be a safe and reliable investment.