Re: How to make 17 BTC out of 7 BTC ?

Does someone has any suggestions how to make 17 BTC with 7 BTC starting capital in short period of time?

No investment is guaranteed to generate you profits in a short time. The only way is gambling, or trading in BTC or in another currency (but it's basically gambling as well).

Trading is absolutely not gambling, it surely has risk as well but not as much as gambling has, and it is proven that trading needs knowledge and experience which gambling has nothing to do with.
Can you find gamblers who can proudly say that they use their experience of knowledge to make profits with it? You cannot.
But you can find a lot of traders who are earning a living with it and that they can proudly say they are traders.

I completely agree. Gambling requires no knowledge and skill in traditional sense, trading does. But the two things that gambling and trading have in common is that for both you need a bit luck and both caries certain amount of risk.

Also, gambling doesn't give us a chance to withdraw the remaining bet amount while in trading, we can cancel our trades if they are in loss and withdraw the remaining amount.

There are higher chances to win while trading as many experts predict the prices correctly and let us know which currency pair to invest on and even it's the case with bitcoin trading where we can get an idea to buy/sell bitcoins which is not possible with gambling. However, many have managed to double or triple their income with gambling.

There are many people who are earning a living with gambling, but its not possible for all as everyone don't have that high level of courage to invest all their money in gambling.

There are many people who are earning a living with gambling, but the proportion of these people are just small number of all the gamblers.

Those people are in general the owners of casinos, that doesnt take any risk and collect their fees, real players able to gamble and live from it at bitcoin are small, maybe 1 person in 100 the ratio.
Doing trading should be safer as well sport bets, but each one has a risk associated to them, to double such ammount without risk its impossible.

Trading is still better in compare to gambling as in trading you hold power to multiply your coins with your knowledge but in gambling it is totally based on luck.

You can make really good profit out of trading. Through gambling, you won't do anything but risk your money. Trading can be done smartly too, although it involves a risk too.