You can insure for more than you bought for–generally you have to submit the number you had in mind, the purchase price, show record, and $ spent on training and then they will approve it.
Things to consider:
- I have heard that insurance companies will sometimes accept your number, take your premiums, and then dispute the value when you make a claim. Maybe someone can say more about that?
- Mortality coverage is just a percentage, so as the insured value grows, so does your cost.
- What do you want/need from insurance?
For me, in a similar situation (train OTTBs for eventing), I’ve decided to focus more on the MM. In part because bringing along cheaper horses doesn’t feel like the same loss (If I bought a 40K horse and it died the following week, that feels worse than buying a 2K horse who 5 years later is valued at 40K and dies). And in part because I’ve found that expensive injuries are much more common and urgent than death (if a horse dies, I have time to gather myself, shop on a budget, etc, but if it needs 10K in surgery NOW, I need to make the call quickly). Also, knock on wood, horses dying in their prime seems less common than having career ending/limiting injuries, or stepping down due to chronic issues, none of which are covered by insurance anyway.
But everyone is different–it really depends on your reasons for insuring.