That depends on how long you are going to HODL your bitcoin. If you buy bitcoin now and HODL it for the next 5-10 years you are going to make a huge amount of profits. Imagine the people that bought bitcoin in the last 5-8 years? Those guys bought bitcoin around $100 to $200 range and yet they can now sell their bitcoins for roughly $8k minimum. Bitcoin is a very good investment for the long term.
The good plan about loaning when you want invest in btc is if you have a business already that can use to pay all of the loan that you will use to buy BTC .