A YOLO is defined by size rather than by direction or instrument. The position is large enough that the outcome determines the account, which is the point: the appeal is the magnitude of the possible result and the story attached.
Communities celebrate the winners and laugh at the losers, and both reactions obscure the arithmetic. Concentrating an account into single binary bets guarantees eventual ruin if repeated, however good the individual calls are, because one total loss ends the sequence. See risk-of-ruin and full-port.
Related: full-port, lottos, risk-of-ruin, loss-porn