I think nowadays yes Bitcoin can't replace fiat because fiat is used already more than bitcoin, but in future we can expect that people will use bitcoin more than fiat
Yes a good part of them are crypto related, and you can check them I can tweet and pin a tweet about your thread, but you have to pay me as explained above. You can PM me if interested.
can you promote for free on your twitter account. If you dont sell it on auction.
I don't understand your question, but this account is for sell and that's the right section to selling the digital goods (like Twitter accounts for example) i think, and with cheap price.