I don't use a credit card. And my investment source is Cryptocurrency. I started investing in 2017, I used my savings money to buy Bitcoin.
I at that time decided to invest and trade, but I was also aware of whether it was risky. But I'm lucky to value Bitcoin constantly pumping.
Currently, the trade has declined and I also experienced a bad thing. But I also relied on Bounty campaigns, so I had a source of income through Bounty campaigns.