What this data shows is that from pre-recession inflationary peak to the present day, U.S. currency has devalued in total 5% over the course of about four years. That's about 1.25% inflation per year, average. If you kept your dollars in an online savings account over this period of time, your interest rate would've averaged about 2%. Kept them in the market and reinvested dividends? Anywhere from 5% to 40% gain per year, depending on your timing competence.
Current inflation levels aren't problematic - deflation could be around the corner at any time and is a much bigger threat at current inflation levels of 1.25%. Some goods have increased in price 50-100%, such as frozen vegetables, over this period in time, for reasons not directly tied to currency valuation.
Want to see bitcoin traded for goods instead of hoarded? The currency needs to be fundamentally inflationary in nature. Where are all of the merchants flooding in to embrace bitcoin? People aren't likely to readily spend bitcoins due to their constant tendency to increase in value and their exceptionally high volatility. It's a hoarder's world. Bitcoin is more like a precious commodity exponentially increasing in scarcity over time, and the fact that people even consider it remotely comparable to government-backed currencies is incomprehensibly ludicrous. After all, like gold, bitcoin is mined, not printed.
