I cant even imagine what will be the value of one bitcoin in 10 years. Of course, its value will increase and the cost of mining will also increase, so this is a very good long-term investment. But I still have not collected a single bitcoin.
It is not too late to acummulate! $9k is a bargain! You may want to $8k around but I'd personally go and get some bitcoin at this price! Next few years will be great!