Yes. Please note there are different transaction limits or minimums depending on the asset.
For Digital Assets, the minimum purchase amount is $2.00. For Digital Funds, the minimum purchase amount is $25.00.
Generally, the maximum amount you can sell of any particular asset is tied to the amount of that asset you own.
For example, if you own $5.00 worth of BTC as reflected on your portfolio holdings page, the maximum amount of BTC you can sell is $5.00.