Keep a record of the FMV on the day you landed.
You may need them for T1135 filing purposes
https://www.canada.ca/en/revenue-agency/services/tax/international-non-residents/information-been-moved/foreign-reporting/questions-answers-about-form-t1135.html
An individual does not have to file Form T1135 for the tax year in which he or she first became resident in Canada. For a new resident, the cost amount of foreign property is its fair market value at the time he or she first became resident in Canada. Use this fair market value in determining the new resident's Form T1135 filing requirement in future years.
https://www.canada.ca/en/revenue-agency/services/tax/international-non-residents/individuals-leaving-entering-canada-non-residents/newcomers-canada-immigrants.html#PBC
Property you owned before you arrived in Canada
If you owned certain properties (other than taxable Canadian properties) at the time you immigrated to Canada, the CRA considers you to have sold the properties and to have immediately reacquired them at a cost equal to their fair market value (FMV) on the date you became a resident of Canada. This is a deemed disposition.
Your property could include items such as shares, jewelry, paintings or a collection.
Usually, the FMV is the highest dollar value you can get for your property in a normal business transaction.
You should keep a record of the FMV of your properties on the date you arrived in Canada. The FMV will be your cost when you calculate your gain or loss from disposing the property in the future.
You dispose of your property when, for example:
You sell it
You give it
It is destroyed or stolen
If you have a loss resulting from the disposition of those properties, you can only deduct those losses from any gains you had from selling the same type of property. You cannot use this type of loss to reduce any capital gains you had from selling other types of properties.
Note
If you are re-establishing Canadian residency and you had a deemed disposition when you left Canada, go to Unwinding a deemed disposition for returning residents.