Rule number 1 in crypto is just like with gold; If you don't hold it you don't own it. Now what does it mean to hold your BTC? It means (in order of safety) hold on your computer, offline computer (cold storage), hardware wallet (trezor). If you need to trade then use a DEX (Decentralized exchange) like Bitshares Open Ledger. This way only you control your funds and no one else. Its that simple.