Not everyone will get 1BTC even today when a millionaire can still consider it cheap. There is always going to be someone who will sell though. A fraction of BTC is still BTC or there is always ETH or whichever altcoin is preferred. It's a free market where anyone can buy, I wouldn't be worrying about the millions of millionaires if they are not buying BTC, their $millions is not mine anyway.
Bitcoin is Bitcoin, buying it you can feel confident that everything will be fine with your coins. And at the expense of altcoins, these are always increased risks, what risks they are exposed to, I will not enumerate all of them well know. Well, if you look at history, altcoins almost always get cheaper relative to bitcoin, so the conclusions are obvious.
Yes, of course btc is btc. You pay for a btc to get a btc not altcoins or anything, that's a disrespect if a seller didn't obey the order of their customers but buying btc does not make you guarantee that you are now secured or you can now expect to earn a profit but it still depends on the ability of the person that owns a btc. Yes, altcoins dump harder once bitcoin dumps, that's only an evidence that there's more people that have a faith on bitcoin. Why would be scared when more millionaires buy a huge chunk of btc? But instead we should be happy for that because that makes the market pump.
@bittraffic yes, there always going to sell their btc's because it does not make sense holding btc forever. We should not worry about the supply or anything else.