All cryptocurrencies are fueled by speculation, and not just any speculation, but rampant speculation. As with any speculative asset, it is probably a better idea to diversify than to hold concentrated quantities of any specific coin. 99% of alts are garbage or fads. If you want to spread your risk, and if you think 2fa will be a catalyst for a higher price, convert some now and kill two birds with one stone. However, I'm not sold that 2fa alone is a catalyst for a higher price. That would assume that there are people waiting to invest large amounts in steem and the only thing holding them back is a lack of 2fa. That may be true, but to me it seems unlikely to be true in a large enough number to meaningfully move the price of what is already a multi-hundred million dollar market cap.