Yes it is old. No wonder, it was the first cryptocurrency, and BTC is built of old technologies like SHA256. It is like a cooking recipe you take some old or in the case of a recipe already known and finished ingredients and create something new. BTC combines old technologies and the harmony of this technologies is incredible. Beyond that BTC was created in a unique time. In Bitcoin’s beginning you could destroy BTC easier with an 51% attack, simply because of the fact that there were not enough miner (hash power) and not enough cash in the market, but also there were not enough interested people, nobody had the purpose to destroy BTC or to make profit of it. Why? Nobody believed in the technology, especially the mainstream thought BTC was a scam or something and due to this BTC had enough time to get bigger, get stronger, more secure, to become the BTC that we know today. It's no matter if you find a technic which is quite better or faster than BTC. Rich people can destroy you, the government can shut you down, you are easy to attack. Is there a better technique than BTC? Maybe yes. Can someone replace BTC? Clearly Not.