network fees are less than $0.01 when transacting directly (that are going back to the cryptominers on the network)
some goods and services might have their own fees so gotta read those "about" page or whatever if this is a worry

taxes wise if u wanna pay them that's alright, for businesses they can report them the same way as they're reporting their sales in cash, no differences there
for regular joe and jane, just gonna say when doing a peer to peer transaction through cash by mail, the irs probably not gonna look in everyone's PO box or whatever
but overall I guess if u have any taxes regulation questions u should refer to a professional knowing local taxes laws in the country you're living in

but also, it's kind of an inside joke for the people that selling the 420s that those postal services are the biggest traffickers of the drugs and they dont even know it (cause thats through the postal services that the 420s sellers sending to their customers)

so as someone that just wanna cash out some cryptocoin to pay that electric bill in cash then if the postal service is safe enough for the career criminals then it's safe enough for electric bills and if wanna tell the irs u got a few cash on hand u can tell them too if u want to sure

here the taxes are different than in the americas, the electric bill comes with it's own set of taxes, food at the grocery store have VAT included in the price of foods (they even taxing the kids in here that just wanna buy some food, literally shameless), when using services like shopinbit the VAT is also included
but if u wanna tell the irs u wanna pay even more taxes on the products that you're already paying taxes on then sure, u could tell the irs, just consult with a professional of your local taxes laws pretty much

Does anyone have any high dividend yielding companies they own?

I do ETFs mostly.