Yes.
I tell my partner everything. And just like me, she is a crypto supporter. So I have no qualms with telling her about my seed phrase or where I have stored it.
We discuss these things almost every day at the dinner table and it feels great knowing that should anything happen to me my assets will not be lost forever. On the other hand, if you have a spouse who doesn't care about bitcoin be patient with them and teach them. Do not reveal to them your seed phrase for it will be unwise to do so.
Why not share the seed phrase with your wife if she knows nothing about crypto? My wife doesn't know about crypto, but I shared everything with her, and so far everything is fine. Because they know nothing about it doesn't mean they will betray you or lose it. They may even store them better than we do because we told them they are a very important asset, and they will never neglect it. As long as both have mutual trust, it doesn't matter to have knowledge of cryptocurrencies.
Probably referring to shitcoins goes beyond the topic of this thread, because we are in a bitcoin discussion thread, and as soon as we start to talk about "crypto" and shitcoins we are going beyond the topic of this thread - and new questions are added that can be discussed somewhere else, but probably not so good to get into that vague crap in this thread, since we are in the bitcoin discussions section.  Why overly confuse the topic with those new (additional) considerations?
With bitcoin, it is one thing to hold your bitcoin with a third-party or an exchange, but in those cases, most of the time, there is not going to be any seed phrase involved.. but there might be passwords and things like that.
If we are starting to talk about holding your own bitcoin outside of exchanges, then we are likely talking about seed phrases that protect wallets.  Yes, some kinds of wallets can hold other shitcoins too.. and those seed phrases could be used to recover all the "crypto" in those wallets - which may well include bitcoin and various shitcoins too.  So, I suppose in those cases in which wallets hold bitcoin and shitcoins, there could be discussions of "crypto" that are held in those locations.. but still, seemingly to be more confusing to referring to some vague bullshit with the term "crypto," and then wondering whether we are talking about bitcoin or some other topic?  
How much bitcoin, and then what is the other non-bitcoin crap that you are including in your wallets that you control and then you are also going to train your spouse beyond bitcoin, too?   I suppose that it might be necessary to describe the differences in case your spouse might not know, and then there might be some concerns about how long to hold each of the various shitcoins, what are the reasons for investing in them and how to liquidate them. which may or may not be the same as bitcoin.
Some wallets support shitcoins and some do not, so then the conversation might involve some kind of description of here is my bitcoin and the various places that I hold my bitcoin, and then here are my shitcoins and the various places that I hold my shitcoins.   If anything happens to me, then look in these various places for my bitcoin balances and there might be shitcoins there too.. or there might not be any shitcoins in there.. but these are the places to look and here are the various ways that each of these wallets are backed up or maybe if there are passwords to access various third party accounts..
I guess the punchline in this thread should be focusing on bitcoin and take conversations of shitcoins (or crypto) to other threads, even if there might be some overlap, it seems to go beyond the topic area of this thread.. especially if you are just vaguely referring to all of it as crypto, so then it becomes unclear whether you are talking about bitcoin or not or the extent to which your description is related to bitcoin, if at all.