Money Management...
If you want to invest 500$ then on initial level just invest 150$ Keep Remaining 350$ in USDt. In case of 30% Coin Drop Buy Again that coin Worth 150$ in case of again 30% Drop . Buy 200$ worth Coin.. after small reversal your Trade will be in profit.
If you have 500$ in Futures
Then Invest Only 20-25% of your investment in max 3 Open Trades use small leverage for safety. Keep rest in backup. Personally I am spot lover.
Rest your choice guys š
Will share more informative stuff