The scaling problem on parade.
The scaling problem refers to the rising transaction fees and slower average transaction speeds that come when a cryptocurrency network gets too popular for its own good. Right now, it looks like both bitcoin and Ethereum are reaching that limit.
The Ethereum network has all but ground to a halt since the start of December, with more than 20,000 pending transactions patiently waiting in the wings since 6 December.
And on the bitcoin network, there are over 12,00 unconfirmed transactions at the time of writing.
The scaling problem
The problem is that the more popular a cryptocurrency gets, the more transactions there are.
On the bitcoin network, miners process translations. Essentially each block skims the highest-fee transactions off the top. Paying higher transaction fees can let you jump the queue, so if your transaction fees are too low, you risk never getting it processed.