Yes, if you cause enough disruption to corporate operations and sabotage profitability, it is possible (though unlikely) that the shareholders will order the companies to withdraw from Egypt altogether. Part of the global system of control is the mobility of capital and the immobility of labor; this allows the owners of capital to move the institutions of their wealth from place to place, creating competing labor populations, and forcing one government to be more accommodating than another, to attract investment.
It is unlikely that foreign investors can afford to bypass Egypt, there is no obvious replacement.
What they want from Egypt is not available elsewhere. If it was only cheap labor, yes, this is available in many places. But Egypt offers a great deal more than cheap labor. A huge consumer market, a gateway to Africa and the Middle East, geo-strategic importance, energy resources, etc.
Egypt is very difficult for them to relinquish, not least of all because they know that while they cannot find a replacement for Egypt, Egypt can find a replacement for them. In the new Capitalist Cold War of the 21st Century, China is the new alternative Western investors.
But, yes, it is possible they will leave Egypt. In this case, you can revert to more traditional revolutionary strategies directed at the state, since the state will have returned to a position of relative sovereignty.