There is a non-zero chance that Bitcoin fails, or like with Coldcard your setup fails through no fault of your own, there are always unknown unknowns and they most be considered. If your stack disappeared tomorrow, you lost your keys, your device was unknowingly compromised, your government demands surrender of your funds, or the unlikeliest event that the Bitcoin network itself collapsed, what would you have left?
You must build value in a variety of aspects, build collections of physical things that were produced in the real world. Buy land, collect physical media, upgrade appliances, collect coins, anything. You must use the abstract immaterial value you have accumulated to build wealth in the physical world as well. But slowly, not all at once.
The Dollar system is gone, only the fiat ghost remains, but in it's time of life it produced billions of units of physical value that had consistent measure and quality that can still be trusted to hold value across time today. The legacy of the dollar network are the coins which will last for millennia, transporting value across time from one hand to another just as the legacy of the Denarius and Aurius networks have done for thousands of years. You could say the dollar network is never really gone as a result, it just moves slower now and there's no longer a fast moving network that enables economies of scale.
You must use Bitcoin to leave a footprint of value in the world, only you can figure out how to do that and with what, but making value real is the only way the Bitcoin network can ever truly be alive. If Bitcoin never moves, if value is never exchanged, then what was it all for in the end? You could die tomorrow, what have you built with Bitcoin that you will leave behind for the future?
End of Part 2.
quoting"Money" is a network of trust, including false trust, more than anything else.
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Sound money is simply when the units of that network are difficult to make, like when dollars were made of Gold or Silver. The precious metal provided a strong check on supply expansion due to their natural scarcity and difficulty of production, but they were not money without the overlying network. Gold and Silver are just commodities that hold value longer than any other physical good, they are no longer money, because they no longer have a trusted network of which they are a part. Gold and Silver are still worth owning IMO, because they are free market trade units now. I can buy privately produced "rounds" and offer them for payment, I just have to make clear that they are not legal tender and not recognized by the banks.
FIAT is "money", or "currency" some might say since there's no foundation of value anymore, not because it's good money but because you can take it to the local diner you've never been to before and exchange it for a sandwich and fries without saying another word to the employees. You cannot do that with bits of Gold and Silver without first discussing what value and money actually is with the person you hope to exchange.
Bitcoin is money without substance, without physicality, it is money in its purest form. At the end of the day money is trust, and Bitcoin created a network of trust with no trust in any individuals or isolated groups required. Trust that the supply won't be debased (to pay for violence and dishonesty), trust that new units are hard to create, trust that you can save for the future, trust that your money is actually yours, trust that you can use it when you need it and it's value will largely trend up over long enough time periods.
End of Part 1.