Assets can be acquired and developed over time with food management. For example, the Habs system now has each of Barron, Hutson, Mailloux, Hutson, Harris, Struble. This forum loves them all, but I'll assume that their current aggregate trade value is currently negligible ... but if they continue to be well managed, to develop well and stay healthy over the next year? Then those six players become a lot more valuable leaguewide, and the Habs will never need all six as they already have Savard, Matheson, Guhle, and Xhekaj. So with good management the opportunity for another Romanov for Dach trade opens up. For example Struble is worth peanuts now, but if he does well in Laval next year he probably has the value of a late 1st.
And this year the Habs' potential asset sale value was tanked by each of Allen, Edmundson, Dvorak, Monahan, etc missing significant time to injury. So the Habs didn't get additional liquid assets (top 64 picks), though in the end they got to draft 5th overall rather than 12th due to the injuries. But that won't happen every year.
And lastly the Habs do have a lot of one kind of asset, cap space, and will have more soon. Whether HuGo uses it appropriately remains to be seen.