It's a game with positive externalities [... ] the trading game in itself is negative only if we account for the monetary gain-losses, but the overall subjective value gaining by the sum of each agent involved in this game is greater than the netting of their monetary accounts (subjective value begets by an exchange needs to be greater than the objective monetary value involved in order that the said exchange happens).
Well, I agree. Besides doubling my BTC holdings every day for a year now, I learned a lot of new things from posts and links in this forum, and (believe it of not) from this thread especially.
Hi! If you doubled your bitcoin holdings every day for the past year, and currently owned all the bitcoins that I don't own, you would have started the year with 10^-117 bitcoins and now own 21 million bitcoins.