Merge pull request #488 from ImranLorgat/patch-41

Getting Started - Footnote on privacy

02_getting_started.asciidoc

@@ -254,6 +254,9 @@ While in this example Alice used an ATM to acquire her first bitcoin, the same b
 Similarly, if she billed a client for a service offered over the Internet, Alice could send an email or instant message with the Bitcoin Address or the QR code to her client, and they could paste or scan the information into a Bitcoin wallet to pay her.
 
 Alice could even print the QR code and affix it to a sign and display it publicly to receive tips. For example, she could have a QR code affixed to her guitar and receive tips while performing on the street!
+footnote:[It is generally not advisable to reuse the same Bitcoin address for multiple payments as all Bitcoin transactions are public.
+A nosy person passing by could scan Alice's QR code and see how many tips Alice has already received to this address on the Bitcoin blockchain.
+Fortunately the Lightning Network offers more private solutions to this, discussed later in the book!]
 
 Finally, if Alice bought bitcoin from a crypto-currency exchange, she could (and should) "withdraw" the bitcoin by pasting her Bitcoin Address into the exchange website. The exchange will then send the bitcoin to her address directly.