To buy Bitcoin with fiat money is very easy, you just need to join one of the trusted crypto exchanges such as Coinbase, Gemini, Robinhood, Kraken, Kucoin, Binance, Bitstamp etc. and complete KYC verification. Next, you monitor the market price, and buy when Bitcoin dips. If possible the price is below $40k per BTC, deposit cash, or you can buy Bitcoin with a credit card or bank transfer. Click on the BTC/USD pair. select Buy BTC, enter the amount of BTC you want to buy at the spot price. Click Buy Bitcoin and wait until you get a Success notification.