Just like stock, you can invest all your money for a coin code if you really trust. But that would be very dangerous. One can make sure that the coin will not fall down to 0 a day.
The advice is to diversify your portfolio. That will help reduce the risk. You do not earn much but if not lost also much.
if we distribute bitcoin to another altcoin is good at top 20 rank in coinmarket for sure we are less risk. Especially the newbie what they are buying does not know the value of the coin they just make them hyper groups. So Controversial Remember that your bitcoin is very dangerous if you invest in a different coin. Investigate before invest.