As a Canadian who earns in USD, should I start holding USD or keep exchanging to CAD?

I'm a self-employed Canadian. I operate 100% in USD as all my clients are in the US.

I've seen a nice bump in income due to our weakening dollar... But I can't help but feel like it's short term gain, long term pain. In 9 years of doing business this is the first time I've been concerned about the state of Canada (pun intended) and our dollar.

I never hold USD. As soon as I receive payment I send funds from US Bank to Wise to CA Bank. But now I'm wondering, should I start to build a nest egg in USD, or continue to convert while the rate is advantageous for me?