Well, if the US Stock market is any evidence of anything atm, it's that it doesn't matter the size/market cap, it can be manipulated. We've seen single entities break central banks. A larger market cap isn't going to solve this issue by any means. It might make the threshold higher, but believe me, there will always be someone there to control it, no matter the size. There will always be volatility, & large deep-pocketed players.
Imo, the only way Bitcoin warrants a larger market cap is if it doesn't hold enough value to keep things moving. I feel like Bitcoin has become a niche passion that people dump money into "knowing" it will go "to da moon". It's a self fulfilling prophecy. This is the behavior that causes this cycle at the end of the day.
Luckily, there's more people accepting wages, paying taxes, & buying goods/services with btc now than ever. As long as this continues, bitcoin will start to be used more and more from it's true intended purpose. Wallstreet is weaseling it's way into bitcoin though, I can promise as the market cap grows, so will the players involved.
At the moment (and for bitcoins small history) there has been a severe imbalance of speculators versus users. The truth of the matter is that not a single person here is not trying to profit from BTC, it's a self fulfilling prophecy in that everyone here thinks it's going to the moon, so we all buy and it just happens to go to the moon...
Tulip bubble anyone? Just because we perceive it valuable doesn't mean it's actually supposed to be THAT valuable.
Whether we like it or not, Bitcoins true value comes from escaping capital controls. Without it, (say if China decided it's pulling the plug tomorrow) it would be much less appetizing to our eastern counterparts and alot of the demand we are seeing at the moment would cease to exist, same with India... At the end of the day, we are all piggy backing off of the panic of capital controls from other countries, mixed with speculators speculating. It's the perfect storm, and I am taking full advantage
but by no means do I think Bitcoin actually deserves such a high price without having as much functionality as some of the countries/businesses it currently has a larger market cap than.
PS that doesn't mean I'm not participating in the fun though, I just use human psychology to my advantage.