The first and foremost step would be to ban Bitcoin, the original cryptocurrency. All governments across the world would have to enforce the steps mentioned below for a ban to be effective. If even one or a few countries stay indifferent, those countries will become crypto havens — akin to the current tax havens — and the ban won’t work.This will discourage all formal financial support, such as banks, exchanges, companies, institutional investors and large buyers. As a result, Bitcoin’s value will get pushed into a downward spiral, making it hard to recover. <I’m not able to think of any example of a banned financial asset that never recovered>The structuring of policies may drop Bitcoin mining power by 55% as it did in China, or even lead to steamrolling over cryptocurrency generating machines, like Malaysia did in July 2021.Bitcoin is an online currency after all. If Bitcoin nodes (miners, exchanges, users) cannot ‘see’ each other online, they cannot transfer coins between one another. Preventing Bitcoin nodes from communicating with each other would essentially render all stakeholders blind.Such a Bitcoin blockade would have to be as rigorous as the ‘Great Firewall of China’ which has been censoring their internet traffic since decades.Dominant operating systems — this means Microsoft’s Windows, Apple’s Mac, and Linux — would have to push out updates that prevent Bitcoin related calculations and applications from working correctly.Similar to secured banking websites in a browser, it is possible to allow only applications ‘signed’ by specified certificate providers to run SHA-256 algorithms, which is needed to verify Bitcoin.Both PC vendors and specialised (ASIC) hardware makers would have to co-operate to alter market supply. Since all electrical items fail eventually, mining would hold no monetary rewards if replacement computers are too slow for this purpose. For example, nVidia makes so-called ‘LHR’ graphics cards that work well for gaming but are unhelpful to miners.The process of ‘mining’ which records transactions in a blockchain ledger is essential for Bitcoin to operate. If stopped, no new purchase or transfers of Bitcoin could occur. The aim would be to slow down mining, making it less profitable and leading to a departure of miners, also hurting Bitcoin speed and price in the process.Researchers have already uncovered indications that investigative agencies like the US’ Federal Bureau of Investigation (FBI) run ‘fake nodes’ on the Bitcoin network, using them as a listening post. They could go one step further, by inserting wilfully wrong calculations or transactions that serve to ‘poison’ the blockchain.They could also make far too many transactions and offer very low fees, to slow down and overwhelm Bitcoin’s normal operation.This would serve to frustrate the few users who may still transact in a globally banned cryptocurrency.As illustrated above, the scale of the undertaking would be enormous, with lasting effects on the tech industry and individual freedoms. Ironically, these measures may make pre-blockade BItcoin equipment more valuable in the short term.Fortunately for crypto enthusiasts in our own universe, these measures wouldn’t hurt Bitcoin in the long run. The Bitcoin protocol/network is not set in stone and has changed many times since 2009. So it may take a few weeks or months for all Bitcoin participants to update themselves, but it would simply evolve to go around the new restrictions.