Unknown to you perhaps but they have all been around awhile, so I wouldn't classify them that way. I'm somewhat new to this but have a small stake in about 35 alts right now. I pick based largely on believing in the product - i.e., does the coin DO something that I think (imho) could see larger scale adoption in the next few years, possibly resulting in 10, 100, or 1000X return? CVC and ARK are examples of coins I bought based on that idea. I am not a "trader" but a "Hodler" btw.
But in the case of these three, I was kind of testing a strategy promoted by Data Dash on YouTube, because I've found I agree with much of his other portfolio strategies and picks (as a newbie I've been reading a lot and and watching videos).. These coins had all been on my watch list but I was attempting to "buy low". He strongly recommends buying on the pullback, when a coin drops to 50% of a recent all time high. They often recover that ath price quickly, or in a few months, depending. It's a bit risky as they might continue to drop (he actually says wait til 50-60% sometimes) but combined with my idea of buying ones I want to hold long term, I bought these three bcz they all met that 50% drop criteria and I more or less believe in them, had been wanting them. I might've been earlier than 50% on TRIG btw, but I'd been wanting it awhile (FOMO).
Thanks for asking, hope that is helpful in your endeavors.