I prefer to invest them all,but i always do this way to not lose them
I prefer safe investments,like btc-casinos,where you can get pretty nice profit every day.
of course it is not much,but always some income every week
You will know in the end why it is better to save your money and you are going to realize it once you are not working.
Because you are funding for your future and of course the investment is included.
But I'm saying that you should save.