A short squeeze propelled Bitcoin beyond $54,000, and a slew of altcoins soared to new all-time highs. Bitcoin roared back above the $50,000 support mark in early trading hours on Monday, climbing above $53,500 by mid-day, after bouncing off a low near $47,000 on Sunday evening. The market's pullback last week had no impact on the mainstream acceptance of cryptocurrencies. Hotels in Nigeria have announced plans to accept Bitcoin as payment.