What do you think about thrumps ACA?

The efforts of the Republic to repeal and replace the affordable care act(ACA) seems to have failed and in  response, President Donald Trump earlier on tweeted that the Republican-held legislature should let "Obama care fail"
"Obama Care isn't just failing, its failed" Donald Trump said.

On the other hand, experts believes its just a mere say and that its basically in the hands of the president to decide if it will fail or not.
 They also opinionated that the federal government pays cost-sharing payments to insurers to incentivize them to join the marketplace to sell plans to low-income people. Under the Obama administration, the House challenged these payments, but a judge permitted the payments to continue pending appeal. The payments would stop if the House suit wins, or if the Trump administration decided to drop the appeal. It’s the uncertainty of whether it will drop the appeal that is scaring insurers and resulting to exist.