You better not attempt storing ETH blockchain's data yet, since there are plans for it to switch from Proof of Work to Proof of Stake algorithm as stated in this article and this another site .
How often do you update the data in your database? It would still take a lot of time to sink bitcoin core wallet if the files contained in the torrent are outdated by at least 2 months or more(at least, that is the case for me. For others, it might not be a trivial issue).