6K is a huge amount of money. To put that in perspective, if invested at the standard accepted rate or return often quoted here, 6K turns into 6 Million dollars in 60 years. I'll be dead, but my grandkids might be thankful if the world hasn't gone to hell by then.
In a shorter time frame, say 30 years, 6K might come closer to 200K and generate 6K a year by itself. (I'm in my mid 50s and can tell you that 30 years happens pretty damn fast!)
So you can --
a. invest it in businesses (stocks) and real estate -- and have credit cards or a HELOC to cover
b. use the checking account churning method mentioned on the forum recently that has an effective rate of return of 20% (I realize you're in Canada so this may be more difficult, but other readers may benefit)
IMHO b. is the obvious choice. Why would anyone pass on 20% return with so little effort. That equates to $1,200 per year on your 6K. Think about that $1,200 vs. under $60. Which would you rather have?