This makes no sense whatsoever. What exactly do you suggest they do? Sell their bitcoins? That will collapse the value and achieve precious little otherwise. Spend their bitcoin on bitcoin sites? Great, but its no different than selling them and buying the stuff with dollars.
The smart thing would be to create/fund/invest in businesses that make BTC useful, and spread BTC.
For any one holder of BTC, it might not make sense. A co-operative solution would make sense - a co-operative funded by large BTC holders with the intention of increasing the value of BTC through various initiatives - new businesses, establishing favorable legal precedent, lobbying, etc.