It is true, but for the most part you've missed the boat.
I don't fully understand bitcoin, but from what I understand it gets progressively more difficult to find coins as time goes along, and need more processing power.
It was a great opportunity when it first started, and the right person could still make something of it now.
But from what I understand you'll need:
-A very heavy duty set of computer hardware with high processing power, likely costing a couple of thousand £ each. (It's possible to make it work with just one, but with the time/processing power/effort needed to fnd coins now you'd be better with multiple sets.)
-Money to invest in high electricity bills each month, as this hardware must be running constantly.
-At least a basic knowledge of what you're doing, although there are guides out there.
Plus it can still be difficult to get real world value for these coins, I think?