Wa'alaikumsalam friends.
My most effective advice is to be diligent in giving alms in this way, then your wealth will quietly increase or multiply without you realizing it.

And as many people say, one of the best ways to multiply wealth is to invest, and investment can be done in various forms according to your ability and knowledge and comfort in doing so. And because you asked this in the right place, my advice is only Bitcoin can multiply money but you have to treat it for the long term with strong conviction and also strong patience in doing so because in the long term Bitcoin can multiply your money very significantly.
And what you need to remember is that there is no surefire way to multiply money well and every method and form of investment certainly has risks that must be considered, but I am sure and advise you to choose Bitcoin if you do it for the long term. Bitcoin has a very low risk compared to other forms of investment or even none at all as long as you do it for the long term with strong conviction and also with strong patience to be able to resell your assets when you are truly satisfied with the existing profits. May you be successful.