Bitcoin was created because the founder satoshi wants to make peer to peer payment system.
He would use bitcoin as the peer to peer currency, so it is not a 'nonsense invention', it is make sense for me.
But i still wonder about the value of btc, why it's value is so expensive.
I think bitcoin is not a discovery, but someone's creation, so that they know that someone's creation can develop. but indeed the fact that bitcoin is able to grow rapidly, because the longer the bitcoin enthusiasts are already quite a lot, to the point that sometimes we cannot count them.