Well, As for me, I accumulate as much as I can and I also plan to sell partially in the bull market, although the plan is to have more and more bitcoin in the long term. What these institutions do tells me little, and those attributed to Satoshi, which are not all clearly his and are probably 'donated' to the rest of the holders, to paraphrase him, should not be on that list in my opinion.

Then comes software wallets. I have done some research here on this forum and also in other places. Everything suggested me towards Electrum wallet. I have used it and it's quite good as it said in every review. But still, everything depends on how you use it. So DYOR and choose the best.

Honestly, I wouldn't worry about it. Bitcoin isn't going anywhere.