Investing:

With ten million dollars, I would invest them into different things. I would first need to study the laws concerning taxes and everything.

Accounts

I would open up bank accounts with different banks, etc. I would buy some Bitcoin, Steem, Ethereum, etc. I would keep some cash. I would buy some gold, oats, salt, grain, canned foods, etc.

Gradually

I would not spend all of my money at once. But I would gradually spend the money on little things. But not to say that I would make the money last forever. But I would try to start businesses. I would try to buy stocks.

Sprinkler

I will try to put a thousand dollars here and a thousand dollars there. I would do my best to try different things because I know many things may fail. So, diversify your portfolios, investments, time, etc.