Throwing money in to new alts is risky. I’m 100% bitcoin any way but i understand why people buy ETH etc.
Follow the leader of any market, with crypto market, it is Bitcoin. Others are following bitcoin and investors should use all or most of their capital for bitcoin investment, not altcoins.
Some altcoins, like ETH, XRP, etc. can be considered as a "safe investment" since they have proven itself on the market every bull run.
It is not about bull runs but about bear market. Projects you named here have been in the market for years and they have gone through 2 cycles of bull-bear-bull market. Those cycles show that their developers keep their projects moving. I am not saying they are good or bad developers but they did not abandon their projects. Their communities grow and price rallies with each bull market.
In the case of new altcoins, however, they are definitely risky. While it may seem appealing to invest into new altcoins especially if they offer very promising returns or ideologies, they are still risky as anyone can just run away with the invested capital.
New altcoins will have fast pumps and dumps, waves but risks to get loss are bigger than chances to get profits. It is true for newbies in the crypto market. Easy comes easy goes. They won't be able to protect profits and capital, all will go away with bear market.