KEY POINTS
  • Any return exceeding $20,000 for bitcoin by the end of 2018 would be up about 200 percent, the Fundstrat co-founder argues.
  • Since its most recent top around $9,800 in May, bitcoin has lost about 30 percent.
  • However, Lee remains undeterred, citing the rising cost of mining bitcoin that could restrain supply and push prices higher.

Tom Lee, the only major Wall Street strategist to issue bitcoin price targets, told CNBC on Thursday morning he sees the world's largest cryptocurrency by the end of the year at more than $20,000 per unit.

That's 20 percent less than his $25,000 target.