Bitcoin was launched in early 2009, had its white paper revealed on 10/31/08, but Bitcoin creator Satoshi Nakamoto has worked on it since 2007, according to his publications.
Many believe that the government can automatically confiscate any bitcoin, but although bitcoins at brokerage firms are susceptible to pledge court orders, cryptocurrencies can be withdrawn for personal wallets, where only the owner of the private key has any permission to spend the BTCs, so it is sugary and reliable.
However, crypto mining is not a waste of energy as it is a decentralized money, and Bitcoin has a consensus mechanism called Proof of Work, which rewards those who direct computing power to ensure the functioning and security of the network, and even which is high cost is still worth it, and in fact banks are a waste of people, energy and time.
Bitcoin is used for payments, but companies are still adhering to this new method, of course it takes a while, but despite giving transaction fees it is still a little high, but
it is still cheaper than traditional alternatives for large payments.
Bitcoin is not a financial pyramid, it is a digital currency that does not promise profits, its price just varies over time and may cause gains or losses for those who intend to trade.
Bitcoin is not a financial pyramid, there is no way for developers to make money from their involvement or take their coins from you. You need to be suspicious of all the investment proposals you receive, especially if they offer "guaranteed profits".
The Bitcoin network is actually completely transparent, all transactions are visible and traceable, but do not necessarily have a name attached to each address, and to contain illicit bitcoin activities there are several companies working on blockchain analytics.