ADA's price is up a staggering 19% on the day and has unseated BNB as third-most valuable crypto by market cap.
Hourly spot volume across multiple exchanges clocked the highest point since Aug. 13.
"We still have support at $44,000 and $42,000, which is the line in the sand for short-term momentum," one investment officer said.
Low levels of daily trading volume persist as bitcoin struggles to edge higher while short positions build.
Seasoned investors, according to some, are increasingly active with data hinting at a strong uptake in altcoins, beginning Aug. 9.
The crypto is now up 57% year to date.
"There seems to be a shift in the sentiment in the market compared to a few months back," said hedge fund executive director Ulrik Lykke.
A clean break above the 200-day moving average could accelerate prices, according to digital asset firm Zerocap.
Ether has rallied almost 60% in two weeks.
The pullback from Saturday's top to current prices is likely to do with uncertainty around the U.S. infrastructure bill, one expert said.
Sunday's price rise follows an unconfirmed report Amazon is looking to accept bitcoin payments by year's end.
Should the cryptocurrency close at or below current prices, that would represent the steepest weekly sell-off since June 14.