Well, 2017 was certainly a wake-up call for bitcoin supporters.  We saw so many people using the software amidst a price boom, the transaction fees went through the roof. Now, they’re back to more manageable levels, but people fear this spike could happen again. Check out the commentary:

https://www.coindesk.com/bitcoins-biggest-startups-are-backing-a-new-effort-to-keep-fees-low/