There will be a point in every company or investment where it becomes too late so I disagree with this thinking. Would you say it's never too late to invest in Myspace? Well, the people who invested in that probably lost a lot of money. Facebook could even go the same way eventually if something better comes along and surpassing it in terms of userbase. Same thing could happen with bitcoin. Bitcoin is far from perfect right now and changes need to be made to ensure it continues to grow without pains and adapt to the growth of the market. If it doesn't evolve fairly quickly it could easily run into trouble and this is one of my biggest fears with bitcoin as a better managed coin could surpass it if it offers solutions to all of bitcoins problems.