I am not surprised, I am a big bag holder of altcoins and I believe that not all of them will succeed in this bear market, I never plan or hope for them to all succeed, but one or two good projects will make up for the projects that failed, it's not wise to ignore diversification when going for altcoins, they are too risky.
That's a good way to invest in altcoins, although majority of the altcoins moves in similar patterns still you don't have to put all your eggs in one basket. People who did that with some of the dead project last year have lost it all.
But assuming they had some investment in other projects, they would had still had some hopes of regaining their loses and made profits since they have coins that has potential to pump in the coming bull market next year.
Also altcoins have different trends and they pump in different times so investing in different coins would be the best way to invest in altcoins. The profits would be huge if all succeeded but in situations of lost, you don't lose all.