References:

iota - https://blog.iota.org/together-iota-and-dell-technologies-demonstrate-project-alvarium/

mastercard - https://www.bloomberg.com/news/articles/2021-02-10/mastercard-to-allow-some-cryptocurrencies-in-digital-asset-boom

References:

elon - https://twitter.com/elonmusk/status/1359791422711492608

apple, bitcoin - https://coinquora.com/apples-rumoured-5-billion-bitcoin-purchase/

Details on IOTA and David - https://cointelegraph.com/news/founder-david-soensteboe-out-of-iota-foundation-after-unanimous-board-decision