As regional banks falter, Bitcoin (CRYPTO: BTC) capitalized on bullish momentum and surged past $45,000, up 3.7% on the day. What Happened:Bitcoin prices crossed the $45,000 mark for the first time since the approval of the spot exchange-traded funds (ETFs) on Jan. 10. Open interest increased by 11.5% in the past 24 hours, reaching $20.2 billion, according to CoinGlass data. Several factors contributed to the surge: The increase in Bitcoin wallets holding more than 1,000 Bitcoin reached the highest level in over 14 months.A substantial inflow of funds into spot ETFs: total inflows as of Feb.8 …