I'm new to the crypto world, can someone help me? How do I know the best time to sell my cryptos or exchange them for other cryptos? The coins I have in my portfolio are: $BTC , $ETH and $SOL . In this case, sol is experiencing a higher percentage growth at the moment, would it be a good idea to move my funds to this currency and take advantage of this rise, and when it starts to fall again, move the amounts to another currency? Or should I hold on?