best way to invest $10,000. Is a CD a good choice?

What is your time horizon?

A cd is not really an investment, as it has very little or no risk of loss but very little upside.

If you are young and have a lifetime of earning ahead of you and plan to continue to invest, a low fee index fund is a good choice.

Vanguard is a low fee leader although Fidelity has some low fee ones of their own.

https://www.fidelity.com/mutual-funds/investing-id...

The income on CD's is lower than inflation - - invest in WalMart common stock

Only if you will need it in six months and you want a six month CD. Otherwise, the return would be lousy.

Sell marijuana to Canada and U.S. because it becomes legal to sell drug in these two crazy countries.

OK but a basket of stocks (mutual fund) would be better. The S and P over a long period of time returns 10%.

It may not get the biggest return but you will know what the return is ans whem you will get it back. Best and worst investments depends on what you your goals are. A CD would generally be a safe choice.