I believe because bitcoin will definitely improve and it will go up. and also, I think will many people using bitcoin to benefit so that bitcoin is more trusted.
I think not everyone can make a profit on bitcoin, even if you believe and are sure that bitcoin is profitable for everyone, but in fact could have been bitcoin disadvantages for others. I think the sense of trust is not it. You just need to believe that bitcoin has a bright future
Not everyone can do it but the most will because its easy and with investing you can already make some good profit by the bitcoin.
It has a great future too so the most will.