There are a couple of ways to buy Bitcoin instantly with a debit card. The first option is to use a Bitcoin ATM.
These are machines that allow you to insert cash and receive Bitcoin in return. The second option is to use a Bitcoin exchange that accepts debit cards.
Bitcoin ATMs are becoming increasingly popular as they provide a quick and easy way to buy Bitcoin. However, they are not widely available yet and can be quite expensive.
Bitcoin exchanges are a more affordable option, and there are many different exchanges to choose from. However, it is important to research an exchange before using it, as there have been cases of scams and hacks.
The best way to buy Bitcoin instantly with a debit card is to use a reputable exchange such as Coinbase or Gemini. These exchanges have built up trust over time and offer good security features.