Too ambitious. But we can't really tell. Maybe by this time, at least 1 of 2 people knows about bitcoins and 1 of 4 is invested on bitcoins. We'be come a long way from bitcoins costing cents to thousands of dollars. But I think it is achievable, the chances ate a bit low for me. If they make sound improvements with bitcoins then I guess the ptobability of the price hitting $20000 is high.