5 June, 13:51 UTC cryptocurrency exchange Bitfinex reported serious congestion on their system and promised to deal with the problem.

Bitfinex is currently under extreme load. We are investigating the issue and will keep you all up to date as we learn more.

— Bitfinex (@bitfinex) 5 Jun 2018

News of a possible DoS attack had an immediate impact on the price of the first cryptocurrencies. So, the graph shows that the rate sharply dipped.

Bloomberg Data

At 15:01 UTC exchange reported on stabilization of situation and restoration work.

Trading and funding is live once again. Thank you for your patience.

— Bitfinex (@bitfinex) 5 Jun 2018

Resumption of trading on Bitfinex triggered impulse the growth of bitcoin. Within two hours, the rate jumped more than 3%.

Data TradingView

Recall that in late may, the price of bitcoin has dropped to $7100.