Blockchains are exceptional in that, after a transaction has become recorded and confirmed, it can?�t be changed. The ledger only permits one particular-way info modification. Buying cryptocurrencies together with other Preliminary Coin Choices (ICOs) is extremely risky and speculative, and this information will not be a recommendation by Investopedia https://binance55681.blogsidea.com/35787034/the-smart-trick-of-copyright-that-nobody-is-discussing