Bitcoin (BTC) is back above $81,500, trading around $81,585 after touching an intraday high of $81,698, as the world’s largest cryptocurrency continues a sharp recovery from the low $60,000s. The move has taken Bitcoin to its highest level since late January and revived a familiar question: is this a short-lived squeeze, or the start of a more durable advance toward the mid-$80,000s? For now, the answer seems to be that the rally has real support, but it is still moving fast enough to make traders nervous.