We simply cannot make a blanket statement to ‘not use public Wi-Fi’! I completely understand the main point of your post - maintain security over your wallets and accounts.
However, if cryptocurrency is ever to become as ubiquitous as ‘cash’ or other hard currencies - the global community must create ways for the ‘every man’ to use this form of payment.
Imagine going to pay for your gasoline, dinner, or ice cream with your cryptocurrency of choice. Opening your wireless device you expect to access the establishment’s internet connection to complete the transaction. We want hurdles removed, currency flowing, and crypto-economies thriving!
What are your ideas for hardening cryptocurrency - and for increasing the ability to exchange easily?