Basically the most safest investment is a stable coins like TetherUSD or TrueUSD. Bitcoin is safe for sure, 5600$ is the dip. But i recommend you to read about other coins under 1$ like TRON, Cardano, NEM, 0x, ICON… Try to trade on DEX like
Ethermium, best among others. Most of the cheap coin are ERC20 type tokens, lots of them are probably flop, but big risk worth it. But if you lookin for super stable usd storage try TrueUSD.