The first one isn't even a real argument. That is claiming new initiatives just won't happen - if you stop being passive for exploiting this new market, not everyone is passive anymore. And about disposing, well, this is where the profits come into.

The third is mildly concerning. If a few companies are swimming in money, they may disturb every market around. Historically this don't last for long, every time the market gets like this, there comes a crisis and destroys those big players. Worth keeping an eye to a "this time is different" event.

Now, the second one is the real problem here.