Bitcoin, fresh off its biggest-ever monthly decline, whipsawed traders with wild swings on Friday as digital assets struggle to regain their footing. The largest token rallied as much as 11.3% in Asia on Friday, briefly closing in on the $21,000 level. Bitcoin then quickly gave up most of those gains, trading around $19,400 at 11:30 a.m. in London. June’s 41% drop was the steepest in Bloomberg data going back to 2010. Bitcoin’s gyrations underscore the uncertainty looming over cryptocurrencies as investors struggle to assess how far central banks will go to tame rampant inflation. Adding to the confusion, major crypto players ranging from hedge fund Three Arrows Capital to lender Celsius Network have been thrown into disarray by the market selloff, raising the prospect of further contagion.