Bull market is going to be achieved if we are able to get a big exposure to the market.
For an example, if a small company decides that it sees bitcoin as a legal tender- then we might get enough exposure to have a good amount of hype that might drive us higher.

A big company involvement won't change much, there are already big companies involved in the cryptocurrency market and it's not like it changes the situation a lot.
A big company involvement might be good for the very short term- but won't do a lot to a 200B$ market.