1-) we need to stop the scammers so that governments and banks take seriously the crypto world
Probably the only way to decrease the scams is to actually educate the people. Beyond that? I really don't know. Scams have existed since forever, and I really don't expect them to be gone anytime soon.
2-) we need to stop manipulating the volumes in the exchange
4-) we need to stop with pump and dump schemes so that governments and banks take seriously the crypto world
For us to achieve this, probably the only way is to heavily regulate exchanges(correct me if I'm wrong), but I think this is definitely something that most people wouldn't want.
5-) we need to stop the shitcoins that increase every day
Unforutnately, as long as anyone can create and start cryptocurrency projects, then there will always be shitcoins. Again, I think the only way to stop this is heavy regulations.