I don't think we can call it greed per se, knowing that there are no certain restrictions for the people in politics to invest in whatever they think will give them profit. After all, they're just people wanting to live a better life like all of us here. If anything, these people are slowly adopting into cryptocurrency and, hopefully, establish some laws which protect the interest of consumers/investors in the cryptoworld. Also, they might, finally, come up with a rather friendly definition of crypto for the benefit of all. I don't see anything wrong in here, TBH, not unless those cryptocurrencies were earned through some form of fraud etc.
We are quite quick to blame the government for everything negative we can imagine these days, but if we were in that position to run a country, we'd probably just end up doing a similar job. We cannot understand how it is to work in these conditions, especially being so detached from the people (no government truly understands the people it governs nowadays).
I'm not too thrilled about the government getting involved in anything crypto, but if they feel like investing, let them pile in. They might have slightly better tolerance for dips than these noobs who scream and shout about ETF's every time it goes down 5%.