Voted for

• under $1

According to the Wikipedia, the first price of Bitcoin was $0.003 USD in the March of 2010, and Bitcoin was worth basically nothing between the January of 2009 and the March of 2010, because "No exchanges or market, users were mainly cryptography fans who were sending bitcoins for hobby purposes representing low or no value. In March 2010, user "SmokeTooMuch" auctioned 10,000 BTC for $50 (cumulatively), but no buyer was found."

I wish I would have bought 10 000 Bitcoin (BTC) for $50 USD from "SmokeTooMuch" in the March of 2010.