If you mean like where to earn money from bitcoin investments , they are different ways .

Earning interests on your bitcoin is one way to go . Platforms like Nexo Wallet give you interest in bitcoin you keep in the wallet . I think the interest percentage as of now for bitcoin in nexo wallet is around 4-6% .

Theres another way to go about too . Go with dividend tokens .
Its similar to dividend shares but you get paid every month for your stake in crypto .

They are various different platforms that offers this . Its pretty easy to get in too . When you select the platform all you need to do is acquire their native platform and stake it in their platform . Commiting for different periods results in different payout too . I use EarnBet for dividend payouts now a days and their platform token in $BET .

So All I had to do is get some $BET tokens from DEX or exchanges and stake it in their platform .After that all you need to do is claim bitcoin every month .

There are a lot of other ways too but most of them are super risky . But if you got money to waste to find whats suitable for you , you can go ahead and jump into high risk investments like DeFi tokens , margin trading , etc