Your strategy is complicated. My suggestion is to stick to a simple strategy: buy bitcoins and hold them for the long term.
I agree, you're doing a lot of things and putting yourself into more complicated things which you can simplify it. You're going to miss a lot if you're putting it on stable coins and you're going to put that on blockfi or any of the same.
You're not thinking of a higher risk that your funds might be compromised because you're not the one who holds it. Instead of getting it into stable coins, use it to buy bitcoin and hold it on your own.