The S&P/ASX 200 closed up just 3.90 points to 7,245.10.
Zip Co and Afterpay fell and Nearmap lost 7.4%.
Technology stocks led the downturn, and offset gains in other sectors.
Afterpay was down 3.6% at the close on a delay to its vote on a $39bn merger with US group Square.
Zip Co was the worst performer on Monday declining 9.5%. Nearmap lost 7.4%.
Gainers included Metcash, up 7.3%, Silver Lake Resources up 5.2% and Gold Road Resources up 3.9%.
Bitcoin is trading just above $US49,000.
Bitcoin and other cryptocurrencies suffered steep declines – losing up to $500bn in value over a single day – as jitters over the impact of Covid-19’s Omicron variant rattled investors and sent them looking for safer ground.
The downward spiral for bitcoin began on Saturday morning before gathering momentum after late-afternoon selling.
Between Friday evening and late Saturday afternoon Saturday, bitcoin fell from $US56,740 to $US44,800.
The Australian dollar is trading at US70c against the US dollar.
