Israeli Prime Minister Benjamin Netanyahu warned on Friday that American military assistance to Israel would eventually end, adding that the Jewish state would need to prepare an “alternate economy” in the face of potential sanctions.

In an interview on Israel’s Channel 10, Netanyahu said American security assistance “won’t keep coming because America has changed, not because Israel has. It’s over and it will be over, it’s just a question of time.”

The U.S. and Israel are currently negotiating over the next memorandum of understanding, as the current agreement that provides Israel with $3.8 billion annually in military assistance expires in 2028. Netanyahu has advocated for ending such assistance to Israel over the next decade.

Netanyahu also expressed concern about the possibility of international economic sanctions against Israel and said the country needs to “organize an alternate economy that can circumvent them,” including utilizing cryptocurrency.

Netanyahu’s political opposition quickly latched onto his remarks, made four days before Israel’s election. Opposition Leader Yair Lapid said Netanyahu was effectively acknowledging that another term for his government would mean the end of U.S. security aid and economic sanctions that would devastate Israel’s economy, drive up prices and cause “irreparable damage.”