If someone gives me such a big volume of bitcoin I'll hold it for long time, because I have my own bitcoin for my regular needs as well multiplying through different methods of earning.

Well I am going to buy my own car too if someone is going to give it to me. And here in my country that is a good source of income that you are going going let people rent your car. Or you are going to register it on UBER or GRAB. For sure you are going to have a very happy time with it.
But before withdrawing it I am going to hold it first.

If you dont think that bitcoin investing is not good and only real world business is only safe then why are you coming to bitcoin, Bitcoin investing are more safe as time goes and more people knowing about bitcoin will only increase the price ,

What OP is telling that if i receive 10btc , i will just hold 5btc in my wallet for future and balance 5btc i sill split in two and do sports betting and altcoin trading through which i can earn 10% daily and like this i can be rich in long term.

If I earn 10 btc I will hold it for a good price rise and if you give me 10 btc I will convert it to fiat and will buy a new car as in our country we can buy a medium range car for that amount.

if i have 10 btc i will hold it in a cold wallet for the coming two years because some members speculate that bitcoin price will jump over 1000 $ in 2017+

If I earn 10 btc I will hold it for a good price rise and if you give me 10 btc I will convert it to fiat and will buy a new car as in our country we can buy a medium range car for that amount.

Well that is a wise thing to do, me either I'm going to hold all of that amount until the price is going to be good at all. And after that,
I am going to withdraw it and going to buy anything that I want or if not I'm going to allot it first to build my small business like small store in real life.
And going to focus again with bitcoin.