Bitcoin isn’t a platform, rather it’s a digital asset. For example, you can compare it with gold, but in digital manner. I don’t know about the platforms that you have tried but yes before investing into bitcoin do a proper research and choose the platform accordingly. Regarding the trust in investing in Bitcoins, then yes, I have been investing on Bitcoins for more than 10 years now. It has never disappointed me. It has give me good profits whenever I am in need of it. I would advise you to go through youtube to learn how cryptos work and then only invest in this.