I had gotten into the Bitcoin thing "early", I suppose. Ran the program. Stopped running the program, crashed my PC. Wiped the drive, and discovered I still had my wallet backed up with my other data. Tried mining, and discovered quickly that it costs more than the return. Hit a few of the "pay with bitcoin" survey sites. I think my total Bitcoin worth is somewhere around $25, US.
Crypto-currencies being what they are, the bigger test for me is going to be how companies like PayPal, Square, and Google will incorporate any digital value into their wallet systems. I want to be able to say "I have 0.08 in Bitcoin, L$747 in Lindens, and $6 in US. I'm going to Walmart to buy a loaf of bread, and a gallon of milk, and a package of bologna. I want you to calculate how much to deduct from each to cover the cost, as I pass through the scanners on my way out the door, using BLE (Bluetooth Low Energy)." THEN I'll consider crypto-currencies to be of potential every day value.