Technical https://bitcoin.org/en/how-it-workshttps://en.bitcoin.it/ Economics https://vijayboyapati.medium.com/the-bullish-case-for-bitcoin-6ecc8bdecc1https://winklevosscapital.com/the-case-for-500k-bitcoin/ Trading https://cryptoquant.com/https://glassnode.com/https://charts.woobull.com/https://www.blockchaincenter.net/bitcoin-rainbow-chart/https://www.buybitcoinworldwide.com/mayer-multiple/https://digitalik.net/btc/ Books