https://personal.vanguard.com/us/funds/snapshot?FundId=1487&...
(Actually, I have more my ~$300k in other Vanguard funds, but if I had to consolidate to exactly one, that'd be it.)
You could also make a case for VT (Vanguard Total World Stock ETF).
https://personal.vanguard.com/us/funds/snapshot?FundId=3141&...
It is a stupid question, though, as it makes no accounting for your individual situation, an important thing that defines your relationship with money.
If I was placing an all or nothing bet with $5k it would go in bit coin. I doubt the volatility will go away anytime soon so I suspect that it will either continue the explosive growth or crash.
If it is throwaway money, put it in bitcoin. It definitely has the greatest potential to double in reasonable time. It also has a fair chance of completely crashing, but, hey, it's throwaway money.