Let assume you only have $1000 and you can put this money in 1-5 projects but they all have to be either old tokens or new tokens that you'll be buying. Which one will you go for, for those that will think they can choose the two type of projects, that won't be possible. I'm trying to see where the attention of investors go when selecting tokens to invest into for the altcoin season.
If you want to diversify into 5 coins, then I would prefer 90% to old coins. And only 10% for new coins. And this new coin is not for the long term. only for short terms and of course the project is really clear and legit. However, this would be very risky. The point is that you have to be smart in managing the risk on the 10% new coins, because this is tricky, you might actually lose the money.
If it's for old coins, make sure you have Bitcoin, whatever the percentage, but I personally will still consider BTC as the biggest asset that I should have.