If you have enough followers on Youtube you get the dolphin votes immediately and your content only has to be average.
If your blog is eye-catching and upbeat, you can then catch the attention of a few of the old dolphins, or the new Youtube dolphins because your blog fits their narrative, and you will earn enough to supplement your income, like the OP, but you are unlikely to become a dolphin in the sense that you can be powering down constantly and your account holds its value, or even goes up.
If you are not an extrovert and not into recycling self-help and motivation, then you could get dolphin support by starting a contest. They like good contests because contests keep people engaged in the platform.
You could even get a whale vote from @blocktrades if the contest is good.
Blocktrades is one of the few remaining whales that actually reads content and votes for what they like, giving decent rewards to minnows as well as dolphins.