Is there a best form of investment?

I think the best form of investment is education. You'll have to invest your time, effort, and money (sometimes) into something in order to get results.

As long as you get educated in a certain subject, chances are, you make much fewer mistakes and excel more than the average joe.

Best form of investment differs for all.

For someone who has a low tolerance for risks, that individual will tell you SSB's / ETF's / Temasek Bonds would be considered his 'Best' investments

For someone else who has a high risk tolerance, that individual will tell you Bitcoin, Stocks, Options, CFD's, DLC's would be considered his 'Best' investments.

Furthermore, to take things a step further, your Best form of investment MAY NOT BE your most comfortable form of investment.

Which is more important if you were to ask me? I would go for comfortable form of investment, one that allows you to sleep soundly at night. Nonetheless, dip your toes in both spectrums of investment tools to know yourself better.