Being new to BTC I would like to know where the BTC are held that are for sale? I am learning as I can understand a complicated subject the deeper I dig into BTC. My stepson is a BTC bull, and he says I need to spend 1000 hours to understand BTC? Other than private wallets, is there a pool of BTC, and how many are there of the 21000000 total available? I am looking to buy more BTC ETF before I go deeper into buying the actual BTC wallet.
Talking about where BTC are been held, it's mostly in wallets I mean people's wallets and sometimes that of institutions, I don't know of any pool just yet but I know originally they do mine bitcoin and then it's been given as a reward to miners who later sale to get actually Fiat to spend and it is also used in stores and othe places where its acceptable as a firm of exchange so it keeps moving from one wallets to another but the bulk of it are mostly found with institutions and exchanges then down to some retail wallets.