Actually Bitcoin and crypto currencies are not required/unwanted
Gold, silver- The rate is too stable for you to make any good profits
Stock Market - What makes you think it is safe? You can end up losing everything. And stock markets are too manipulative, so hell no.
Fixed deposits - The rate of interest is so shit, it is shit and it is definitely not worth it.
Start /Invest in a business - Not everyone is smart enough to make good profits right from the beginning, and investing in a business, pretty sure it is not worth knowing how bad the recession period is going.
Why bitcoin? - hey bitches it has made millionaires, whilst other investments, yeah sure they have done a lot good.