it is not a good idea to start bag holding altcoins and call it a "portfolio". you can ask all those newbies who started last year and fell for the "portfolio" scheme and lost all their lifesavings in pump and dump altcoins.
the problem is, there is no stopping the altcoin dumps since they have no future. so when the dump comes and you have multiple bags, it is going to be impossible for you to sell them in time. then it becomes too late to sell by the time you make a move so you hold longer and the small dead cat bounce happens. so you hold some more time. then another dump comes and the same thing repeats. this is repeated multiple times until you lose 80% to 90% of your investment and now you are broke.
Ok, so let make it clear. I'm certainly planning on adding some BTC and ETH while the pumps of my alts happens in the time.. however, i can't agree that alts have no future and that most of them are just pump & dumps coins. It looks like that you didn't read a lot about this projects. At least some of them certainly have a bright future in front of them.
Peace.