from 2017 there is only very few coin or token that exist still now, so on the present time, old coin are more valuable to invest in. but that doesn't mean new coin are not good to invest in. but you are need more strict to choose coin to invest in.
Maybe for now, investing in old coins is a good thing, instead of investing our money into several new coins, although investments have their respective risks, it's not without reason that we can trust the growth of old coins, coins or tokens that have sprung up this year, very it is not recommended to invest funds in such projects, and it tends to risk losing money, because as we see today, all coins are competing to show who is stronger and better in the global market...
There are lots of advices and there are lots of things one can do for a better life.
But not everything works for everyone.
So come up with your own unique ideas and give your best for it.
Coins are good option - if you are skilled and well informed how to use them and how not to be a looser.