Coinbase transaction smaller than .001 btc? & Blockchain says my Bitcoincore wallet is invalid I'm trying to figure out how to send tiny transactions, like 10 cents.  Coinbase says the minimum is .001btc.  That seems rather large.  Is that just a coinbase requirement?
Also, my blockchain wallet says that my bitcoincore wallet receiving qr code is an &quot;Invalid Bitcoin address: &quot;  Why?
Also, my blockchain wallet says that my bitcoincore wallet receiving qr code is an &quot;Invalid Bitcoin address: &quot; Why?

It might be that your Blockchain.com wallet doesn't yet support the Bech32 address format (addresses starting bc1...) introduced four years ago.