Considering changing my bitcoin supplier

Hi all, I’ve been with Binance since I started but I’m considering safer options for my local area. I have 6 in mind. Have many people here used Swyftx or Etoro?

I’ve heard a few negative things about Coinbase recently / their reputation and reliability.

Lastly, has anyone heard of info pointing to a reddit thread saying that Bitcoin is not fully “random” but controlled by other sources? Seems like if that were true we’d have more info on it though