I trust bitcoin because I trust maths.
Can you elaborate more on what you have said? I know bitcoin exist because of 1s and 0s, But its more than that to make you trust Bitcoin. Even though it has numbers on it, it does not make me trust something. For example I don't trust any mining site as they still don't have any proof of such a company exist. But I trust Bitcoin not only because of its price but also because of its acceptance from big businesses.
Most likely, people trust in Bitcoin because its total supply of coins is limited to 21M coins by the algo of the Bitcoin protocol. Thereby these people believe that no one will be able to arbitrarily inject into the system new money beyond what is hard coded in Bitcoin and by doing this inflate the coin...
Personally, I wouldn't put so much trust in that, but this is just me