That's a good question. Have you thought about an exit plan? Where if something happened and you lost those crypto you bought using your loan? And have you already done the math? I know 19% P.A. is greater than 5% P.A., but loan usually required you to pay back on a monthly basis and if you plan on using the Interest to pay off the loan, you have to think twice as every transaction  does have many cost associate with it. It might not worth it.

If you already thought over all the things i mentioned above and decide to go for it. All the best! and let's hope we all huat huat.