Larger rival Bitcoin also gained in its wake with the world's biggest and best-known cryptocurrency rising 3.7% to $36,977 in quiet trading with London and US markets shut for holidays.
Bitcoin has been less volatile in recent days but is down by more than 35% this month, weighed by growing regulatory pressures on the sector.
The cryptocurrency had slumped almost a fifth from its all-time high hit earlier this month.
It was last up 9.5% at $53,792.0 after touching its lowest since early March on Sunday. Other major coins ethereum and XRP, which tend to move in tandem with bitcoin, were up around 7.7% and 20.4% respectively.
