A reasonable definition of 'poor' is holding no net wealth, or less - which applies to 30-40% of households in Scotland (for example):
https://www.gov.scot/publications/wealth-assets-scotland-200...
So your arguments here don't apply for my understanding of 'poor'. You have to be approaching median wealth before those arguments start to apply, if they do at all.
A poor person is not greatly affected by debasement of their savings in currency, because they don't have any savings.
A poor person is not considering throwing their savings into Bitcoin, because they don't have any savings (beyond essential cash).