If I plan to hold BTC long term anyway, what's the downside of staking it for some extra interest?

I recently found out that you can stake BTC on crypto.com and get 6.5% interest on it per year and I'm trying to find some downsides to this because it sounds too good to be true. I'd like to hear the cons for doing so, so far what I've found is:

• The BTC you stake is locked up for 3 months and you can't touch it

(Not really a problem for me since I'm a long term holder anyways)

• Since my BTC is on crypto.com and no longer in my wallet, it's not my keys and not my coin
• Somehow crypto.com is a scam/and or they get hacked and I lose all my BTC that is staked

(Seems fairly unlikely to me as they are a decently big exchange with a lot of investments for their future)

• BTC is not a Proof of Stake coin so I assume they convert my BTC to another coin, stake that for higher than 6.5%, convert back after 3 months and pocket the difference?

Hopefully some of you can clear my concerns up for me. Thanks.