See there as such is no risk in buying 3-4 bitcoins.
This is because the value of bitcoins fluctuates around a stable value.
That is consider today's scenario the value of bitcoins is stable around 1100$ but fluctuates a bit.
So if you purchase 3-4 bitcoins and if the price rise or growth rate of BTC is slow you won't loose much.
There is no such thing as a no risk investment.
If you're expecting revenue from something then expect loses also.
Assuming there would be a bullet proof investment what would it happen when everybody invest in it?
Where would that profit come from?
Bitcoin prices are all over the place , don't even mention the word "stable".