The beauty about Bitcoin at the moment is...you don't need a whole BTC to start earning money, you have the option to buy chunks of a bitcoin (BTC) for as little as £50.
This little chunks earn you a daily return of about .75% to 1.25% (average 1% a day).
These little BTC chunks add up and when it reaches the value of another pack you can rebuy a pack from your daily earnings (this is compounding)
So you can start with £50 but after one year you can end up with a lot more.