"A further eight per cent of respondents said that they were somewhat not interested. The percentage of respondents who said they were interested or somewhat interested, meanwhile, was 19 per cent."
I'd say your still on the high side (no pun intended) if you consider the above and the growing number/percentage of seniors and as you mentioned the underaged in those numbers.
Time will tell how big (or small) the market is. No question some of the investors that got in early have some very nice returns (hopefully some of them realized), but I given the valuations of a number of them, I'd be very nervous (and selling).