The more money will come in to bitcoin, the higher the price is.
The more money that comes in the more money will go out as well.
This is the reason why many wants to see institutions and bankers to start getting into bitcoin. We all love to see the price of bitcoin increase once again, we've been into a very long dip and this is the hope that's being seen.
People are waiting with a high level of panic because they feel their dreams of getting rich in 1day with bitcoin was a lie and now they are sorry for it. They are ready to sell as soon as price rises again. Basically they are captalising the fear and uncertainity being fed by no-coiners and market manipulators.
But if these banks will step in, there's nothing new with the old system even though they'll get in and adopt bitcoin. They do charges usually with their transactions and operation.
However the chances are very slim as to how much traditional financial systems would accept and allow bitcoin. Regulation is not easy to do and neither is running an economy.