It costs Bitcoin to buy & sell in Bitcoin.
That's crazy. That's why it can never become a real currency.
The ONLY crypto that even stand a remote chance of being taken seriously as a currency are those with:
- Zero fees
- Extremely high transactional throughputs.
Bitcoin is neither of these.
Anybody telling you to buy and HODL Bitcoin in 2018 is either Misguided or Disingenuous, or both.