1. It's still being used
2. It can be diluted. Bitcoin can't.
1. It's hardly being used, and rather insignificantly at that.
2. Decimating Bitcoin is no different than inflation or "dilution."
Let me repeat that because it bears reiteration:
Decimating Bitcoin is no different than inflation.
Repeating a claim is not a sufficient substitute for a valid argument. I'm not even sure you know what "decimating" means.
If my usage of "decimate" leads you to question my knowledge of its meaning I am absolutely certain you have no idea what it means.
dec·i·mate/ˈdesəˌmāt/Verb
1. Kill, destroy, or remove a large percentage of.
2. Drastically reduce the strength or effectiveness of (something): "plant viruses that can decimate yields".
or this from Wikipedia:
Decimation (Latin: decimatio; decem = "ten") was a form of military discipline used by officers in the Roman Army to punish mutinous or cowardly soldiers. The word decimation is derived from Latin meaning "removal of a tenth."
Now, you could mean "a technique for reducing the number of samples in a discrete-time signal. " (also from wikipedia, but that would make even less sense.
If you destroy bitcoins, the rest become more valuable because of the law or supply and demand.
If you imply that somehow we can move the decimal. effectively increasing the number of Bitcoins by ten, then you are simply pissing into the wind. not. gonna. happen. Can't happen in fact without the consensus of the very people who would stand to lose the most if it happened.