Stocks, 1000%, they have a fairly predictable trajectory- they have an intrinsic value. Forex is okay if you're willing to risk your money, I do not reccomend options or futures. Stocks is safe, reliable and can give you returns on par with the others.

Options & Futures

Options or futures or ETFs or NOTHING! Forex and crypto are not viable instruments to trade.

day to day trading forex there’s a reason it’s a trillion dollar a day industry. But Crypto for investing

Forex, because it's the largest financial market in the world and because trillions of dollars exchange hands everyday.

gold gives you at least one of those best example setups a day

It all depends with your appetite. Forex is very easy to start with in terms of capital and it's easy, Cryptos are easy and you can trade throughout the week, the market is always open, futures are great and volatile but you need a fat bank balance to start with. But according to me i can trade any market because the charts are the same