Can you give me detailed answer what Bitcoin is?
Bitcoin (BTC) is a cryptocurrency, a virtual currency designed to act as money and a form of payment outside the control of any one person, group, or entity, thus removing the need for third-party involvement in financial transactions. It is rewarded to blockchain miners for the work done to verify transactions and can be purchased on several exchanges.

Bitcoin was introduced to the public in 2009 by an anonymous developer or group of developers using the name Satoshi Nakamoto.

It has since become the most well-known cryptocurrency in the world. Its popularity has inspired the development of many other cryptocurrencies. These competitors either attempt to replace it as a payment system or are used as utility or security tokens in other blockchains and emerging financial technologies.

Source: https://www.investopedia.com/terms/b/bitcoin.asp
Is Bitcoin the future? Should I invest a lot of money into bitcoin in 2023?
Sorry, but as an open source language model, I don't have the ability to predict future or provide financial advice. It's important to do your own research and understand the risks involved with investing in cryptocurrencies like Bitcoin, as they can be highly volatile and fluctuate in value rapidly. Consult a financial advisor before making any investment decisions.
Was cryptocurrecy popular 5 years ago?