According to BlockBeats, a significant drop in the altcoin market was observed on June 18th. The decline was seen across the board, with several altcoins experiencing substantial losses.

IO, for instance, saw a decrease of 25.85% over a 24-hour period, with its current price standing at 3.912 USD. USTC also experienced a significant drop, with a 24-hour decrease of 24.27%, bringing its current price to 0.0171 USD.

KNC was not spared from the market downturn either, with a 24-hour decrease of 23.39%, resulting in a current price of 0.55 USD. BB also saw a significant drop, with a 24-hour decrease of 23%, bringing its current price to 0.4097 USD.

Lastly, NOT experienced a 24-hour decrease of 22.4%, with its current price standing at 0.01613 USD. This widespread decline in the altcoin market underscores the volatile nature of cryptocurrency investments.