I kind of doubt that I'll download an Electrum wallet with some malicious code if I'm going to install it right from the electrum website. People have been using Electrum for quite a while now and no one has lost their coin yet. Although it's possible that the whole thing has been malicious ever since and Electrum is just waiting for the best time to harvest all the coins saved using their wallet. Oh well, there's always a risk to take. Even online wallets have risk
It doesn't make much sense to wait that long
Apart from that, Electrum wallet seems to be open-sourced so someone (and likely not a single person) has apparently already checked the code for malicious content. But this doesn't guarantee that someone else might not hack their site once upon a time and put there their own tainted version of the wallet. It might make sense to install the wallet but still keep coins in a paper wallet (i.e. in a few paper wallets), and import the keys when you need to send some coins. I recently tried to install it from Gentoo depository but some dependency failed to compile, and I'm not inclined to get into this right now