Bitcoin has a fundamental problem, all Blockchains are secured by rewards and costs. Cost of electricity vs rewards from mining. But rewards force downward pressure on the price, price has to be at a certain range for miners to make profit relative to cost of electricity. But every 4 years the rewards are cut in half, so price either doubles or miners make less. If the profitability range was previously $20k, then after halving it's $40k. If the price stays below profitability for too long then miners would drop off, less hashrate = less security = higher chance of a double spend. It's a vicious cycle. Bitcoin has been expanding supply like crazy since it was created, literally on Jan 10 2009 there were only like 600 Bitcoins, now there's over 19 million. Most of the early miners never sold and are now holding massive bags. Gold however is secured by the will of the Aeons. Make your pick.