Couple questions...
If I convert all of my US Dollars savings into Bitcoin, what are the chances it will loose value?
What if my employer paid me in Bitcoin? Can I avoid the illegal income taxation by the IRS?
1.) I would highly advise against this. You will be risking your future on extremely risky speculation. You may loose half your value in a month. Can you afford that? Bitcoin never was designed for speculation, you can of course but you may as well but lottery tickets. This is a social experiment and we aren't even at version #1 yet.
A better stratigy is to buy some coin and start using them on the internet. Then you can see the real advantages of BTC. It is the fastest, cheapest, safest way to send money anywhere. You may also get a better deal because the price has gone up.
2.) There is no avoiding death and taxes. If you were paid by an employer in BTC you still owe income tax because you still received income. When you spend some of your coin you will also need to calculate capitol gains.
Example:
Bob is paid $100 dollars in BTC for a day of work. His tax liability for income is 30%, so after income tax he has $70. The next year he spends his BTC buying shoes. His $70 worth of coin is now worth $120 because the price has gone up. Wohoo!
However he still owes capitol gains on the appreciation in value of his coins when spending or cashing out. So, 120 - 70 = ($50 of taxable capitol gains). His CG tax could be from 0-20%. Let's say it's 10%. In that case he owes the IRS another $5 in CG tax. If his coins had depreciated he could also have claimed a loss and perhaps gotten some tax relief.
Hope this helps!