isn't that illegal is some countries? also that would create a legit reason for banks to go against bitcoin (IMO).
better not do that.

People have been going around handing free bitcoin paper wallets for a while now. It is a nice idea to get people interested, but the way you are proposing has a risk attached to it.

Imagine receiving a banknote with 0.0005 btc written on it. People that don't know about bitcoin trade those banknotes around like it is fiat banknotes, without realizing the private key is on the same banknote. Also, they probably didn't check the public key to see if the bitcoins are still on that address.. They risk losing out this way.

Think of it this way: I could write down the private key, hand the note to someone else and immediately import the private key and send the coins to a different address.

...

Defacing paper currency is usually illegal in most countries.

Yet, I have seen "END THE FED" stamped on US money.

Not to mention telephone numbers and other small notations.

I see no harm in putting a public & private key on a US$20 or a €20.  Just don't get caught!

It's similar to idea of stamping "time for plan BTC" on banknotes. That didn't get great reception among community, many saw that as low level spam and rather bad PR.

Also if someone claim the tiny amount, banknote goes back into circulation and the next person who bothers to visit website and (manually?) type in the priv key just to discover there's nothing on it anymore, will be hugely disappointed.

Not the best idea, but you could do it just for lolz, and to check how many people have bothered to withdraw.

It's actually legal in the US as long as intention is not to destroy or make them unusable.

nice idea,if bank not problem with that,its okay and will effective to introduce bitcoin to people and banks member.
but i dont think its will can applicable in every banks,and dont put 0.0005,its too small,raise the amount about 0.001

Will people understand what it means? I am not sure but it's good that people and community trying to make bitcoin much popular.

So it's possible to take 10% of 9 bills to create a new acceptable bill?

I can guarantee you that no bank will give a shit about some writings on few banknotes. They wouldn't even notice, and what banknotes have to do with banks? You make it sound like banks own banknotes.

I'm not sure whether such thing would be illegal in EU. It's allowed in US (as posted above).



Or he could do both? These 2 things are not quite the same in terms of promotion.
-----

side note, BTC0.0005 is definitely to small for the purpose. Better do less with at least BTC0.0025 (around $1) each.

That's what I wrote few posts above. But on the second thought, such people would at least learn a little bit about Bitcoin, private keys etc.

Overall I'd say such guerilla promotions are no longer needed, it could be somewhat useful 4-5 years ago. Bitcoin has grown past that stage.