Do people here put a ton of money staking stablecoins in sites like nexo, celsius, gemini etc?
Staking in my opinion is more promising than internest banks, and for almost a year I have been actively staking with several major coins such as BNB, MATIC, Stable coins and so on, and for stable coins I use for staking altcoins and from the list is Celsius, besides that I also use for staking new altcoins because it provides a large APR up to more than 100%.
There is some downside of staking in comparison to banks. If it is an altcoin you are staking the price of your initial investment will also surge with the whole market. That means you could gain additional altcoin but its price in USD could fall below your initial investment. This won't happen with banks because of stable fiat currency. Also if you are providing liquidity then you should know about impermanent loss too.
Staking does contain speculation as you have shown. So to do that, you have to understand the risks. if we can understand, then it is safe for us to stake on a trusted coin that is on the top board, even though when we get a staking coin the price drops, but one day it will come back again, it can even provide double profits. This is different from bank interest which is nominally small, and of course below the inflation that occurs
Everything must always have a risk, so it is very important that before doing anything, understand everything, including the risks.
besides that we also need to know how staking works,
because if without any preparation it will only make a loss