well if you gonna give 10 btc i will spend it in:
1.30% for Investments
what investment are you planning with 3 bitcoin can you elaborate more on that?
2.10% for credit card and other debts and rent of my apartment
i don't like this choice because you will end up paying more in fees to the company (third party that issued the card) so you are better spending fiat instead.
3.5% in Gambling
this is bad especially because it is a large amount of 0.5
BTC and you will only lose it in the process.
4. and the remaining 55% will save it for future
nothing especial here anyways. the easiest way of profiting from bitcoin is just holding it!