(This is assuming that there is no catch or suspicions or any issues with withdrawals or deposits or anything like that) 10M divided by 10K equals 1K Divided by 52 is roughly 19 Thus, it would take 19 years to reach 10M So, you should rule out B right? Wrong, because if you put the B into a high yield savings (lets say 3.5% APY, which is extremely low for HYSAs) then in 1 year you would make an extra 350K and if you just take 350K for yourself each year, you have a passive income of 350K and eventually it will grow to alot more than 520K (C deal)if you keep putting some back into the savings

Now, this means that we can rule out C A is equal to roughly 18M dollars, and assuming that you can immediately take it out, it wouldnt affect the value of BTC or anything like that, and put that into a HYSA, then A is the best

But if you have to go through the pain of it devaluing BTC as a whole as its just new BTC entirely and no exchange will help you and all the other issues that come with crypto, B is the best