Actually, it is trust that gives bitcoin its value. But don't fret, it is the same for any other investing instrument or valuable assets.

See, fiat currency are mere paper bills that are printed by the central banks. How come those paper holds value? Trust is the answer. Otherwise, these paper bills remain to be paper alone.

But with the central bank dictating that these paper bills are trustworthy enough to be accepted as payment, then none could really argue once that trust is laid upon paper bills or coins.

And the same applies to bitcoin, every piece of bitcoin is trust driven.