Both spot buying and selling and futures trading have their personal benefits and downsides, and it ultimately depends at the individual trader's desires, threat tolerance, and trading style.
for beginners?
exactly spot trading.
future trading is not recommended to beginners.
although bith spot and future have risks, the risk of future trading is much higher.
In future trading, if we have no exact knowledge to analyze, this will be exactly like gambling. moreover this is different because the use of leverage that can also make our money lost easily because of suddent different market changes, causing liquidating.