How many people knew Bitcoin in 2009 and how much was it worth in 2009?
Your guess is as good as mine. Not many people, both here and outside this forum. I learnt it was worth less than a cent around that time.
If someone bought Bitcoin in 2009, is that buyer rich now?
Not all who bought Bitcoin then enjoys its present benefit in value. Many of the early adopters didn't know of wallet security and thus a lot of wallets were vulnerable and got easily hacked. Some lost their PKeys or access details and can't gain access till date.
Bitcoin now stands at 26,893 and was it lower in 2009?
This question shouldn't have been asked as the answer is obvious.