The Cottagers have so far been frustrated by Ajax's refusal to discuss compensation for the release of their manager.
Speaking after Tuesday night's 7-0 friendly win over amateur side Rijnsburgse Boys, Jol said: "We will talk again in the morning about the future of Ajax.
"We need to strengthen the squad - everyone knows this - but there's no money.
"We have lost some good players and no-one is coming in. I fear for the future of Ajax in this position."
"In the past I have had other offers that no-one knows about. Now in England it is public, but that's not my fault."