KEY POINTS
  • Elevation Partners co-founder and early Facebook investor Roger McNamee thinks 2018 will be a decisive year for bitcoin.
  • If the cryptocurrency lasts that long and continues to gain value, even a crash couldn't stop it from becoming a legitimate business, according to McNamee.

Bitcoin might be all hype, but it could withstand a crash and become legitimate, particularly if it sees enough gains in 2018, according to tech investor Roger McNamee.

Bitcoin is "still a very small market in the context of the larger financial world, but it has had a huge year. We've done it around a speculative mania," the co-founder of venture capital firm Elevation Partners said Thursday on CNBC's "Fast Money." "If a mania goes on long enough, it becomes self-fulfilling. Even after a crash, what follows is a legitimate industry."