for big risk you can invest in new project.
but for safety and long term you can invest on top 10 coin like btc and eth.
but from the gain altcoin will give more if that project success.
but you can also lose your investment on that.
40,000$ is very big amount and i think this will be total amount one can afford to invest in crypto. This amount should be invested very wisely and taking risk from capital investment is always bad decision. The best strategy at this situation is to wait for some correction and then invest 10k$ in top 5 coins. these coins have high marketcap and chance of heavy dump is less than other. now just wait for bull to get profit. profit generated from these coins can be invested in new coins for high profit or loss.
If tokens start dropping then no need to be worry because we have still 30k$ which we will use for buying when token drops more than 60%.
The most important thing here is booking profit. no need to wait for 10x but when you see 50% or more you can sell half or some part to book profit. no one now the ATH of any coin and we have to make own strategy for booking profit.