In terms of risk, it is safer to just invest. In terms of profitability, it is more interesting to send coins to stacking and earn additional new tokens if we are talking about profitable farming or interest from providing liquidity. If we're talking about altcoins, POS mining is much more efficient than just holding, but it's dangerous to send all your coins to stacking completely, so you should keep some of your coins in your wallet and send some to stacking pools to observe the risks. It's dangerous to send all of your funds to a steaking pool because of the various risks involved.