Suns build momentum for play-in spot, but can they sustain it through upcoming gauntlet?

Thanks to Wednesday's 127-121 win over the Chicago Bulls, the Phoenix Suns finally won back-to-back games for the first time since Jan. 27. They're also officially (temporarily) back in the 10-seed in the Western Conference, which means if the season ended today, they'd qualify for the play-in tournament and have a chance to win two games to secure a playoff spot.
But as has been the case after every other win against lesser competition for the last six or seven weeks, the question is: Can the Suns actually build on this and sustain it?
No one should begrudge the portion of this fanbase that would emphatically answer, "No." The old "fool me once, shame on you, fool me twice, shame on me" ada...