Unless It's going to be open source , people won't trust holding their funds in an unknown website like yours.
I checked your recent posts and It seems like you don't know the basic things in how Bitcoin works , nor a programming knowledge, I wouldn't recommend opening such a website honestly unless you have enough resources (millions of dollars) which I assume you don't.
It's not as easy as It sounds since you need to hire developers , designers , and the most important thing security experts , unless you have a team of experts ready to work for free of course (which I assume you don't once again)