It basically just means that he pumped ARKK with debt and/or gains from leveraged investments. You could say that the implication is that ARKK's main investment

It basically just means that he pumped ARKK with debt and/or gains from leveraged investments. You could say that the implication is that ARKK's main investments, e.g. TSLA were also pumped. Given that most of ARKKs investments started to tank around the same time this fiasco happened, it could also imply some level of interconnectedness that investors were not explicitly made aware of (and they probably should've).