First calculate the need you need to adequately out of it and reserve your salary to face the unexpected affair that requires funds from the salary.
The right approach is to first pay off all your debts , monthly bill etc. Then what ever is left is your saving. Out of that keep small % every month as a contingency fund. Then rest of them you can invest in your diversify portfolio like stocks, currency, cyto currency etc. Ensure you do invest a small or whatever best you can invest in btc and good other altcoins .