Just pick on the top 10 crypto based on coinmarketcap. Choose at a minimum of three (3) crypto. Before buying their coins/ token. make sure you already studied their product/services offered and futures plans. It is best to buy now so you better make a decision fast because sooner or later the crypto will be on another ATH again. good luck
I would take $200,000 and reserve it as money in my bank account. The rest could be used in trading of altcoins and bitcoin and this might be a good buesiness if you're a good trader.