According to https://bitcoinfees.21.co/, it needs 420 satoshis/byte to get fast confirmations. Anyone know why the fees are going higher and higher?
Wow 420 time for the weed references.
But to answer your question too many transactions occurring and not enough space to process the transactions at 1mb.
https://en.bitcoin.it/wiki/Block_size_limit_controversy
Yes and I would like to add that the cause of this is network spamming. There is someone out there who is constantly spamming and flooding the mempool to slow Bitcoin transactions down. Some say it is Roger Ver the others say it is Core's doing.
Whoever it is I can imagine him doing the evil villain laugh everytime he starts spamming.