Can you please help with any Altcoins that coins that someone can invest on in this particular time.
Why focus on Altcoins when you have the opportunity to buy Bitcoin with that huge amount of money? The question now is why are you asking this to us? Do you have that amount of money? If yes, then why are you asking help for us? Will you take our advice, and will buy the tokens/coins that we recommend to you? I don't think so. Sorry for being harsh, but you are just asking this for the sake of just asking, and in reality, you don't have the money.
Anyway, to answer your question, I will put 50% of it into Bitcoin, 40% of it into Ethereum, 10% in other top coins like BNB, Cardano, etc. I would like myself to be stress-free when it comes to investing thus, I put 90% of the total amount into something that will not give me stress, and Bitcoin and Ethereum have been the top 2 coins in terms of market cap for long time already, so the trust has been there already especially with Bitcoin.
Good luck OP, I guess, and I hope you will really take our coin recommendation seriously. I hope you really have $20,000.