Trying to determine the Bitcoin float is impossible.
No one has any verifiable data of how many BTC have been permanently lost.
Once you factor in a future with quantum computers, it is possible that no BTC will ever be lost, and questions (i.e., lawsuits) about true ownership could last for decades.
Until there is some legally acceptable method to determine exactly how many BTC exist, plus some legally acceptable method to define ownership, the market value of BTC will be a speculator guessing game.
I remember when bitcoin first came out and they were giving away a free one when you read their whitepaper.
I know that mine is lost, I assume there are a lot of them that are.
Nope. The markets will set the price. The price will steadily go up. Demand will dictate the price. Gold cannot stay number one of all assets because everyday it is created through mining and has an unlimited supply. I hope to be around to see BTC eclipse every asset, and then exlipse the top ten combined:)