if you actually know what you are doing (but your question suggests that you don't) and have a knack for trading, it is a good idea to keep 50% in BTC and invest the rest in alts. otherwise make your life easy and keep it all in BTC - the BTC bull run will presumably continue until the end of the year, making investing in alts dangerous for the unexperienced ones.
For people interested in investing in alticoins, they are protected by a blockchain algorithm in which each user can monitor or see the total supply of Bitcoin in circulation and transactions on his digital network in a transparent manner.
Yeah right, if do not understand should be careful