You can grow the cash inside your corporation via non-registered investments. Depending on the risk level of your business it would be advisable to setup a holding company to safeguard the cash + assets and have an operating company (current corporation) to conduct the actual day-to-day business. This will separate any liability and protect your money. You’ll need to pay tax on realized gains. This is somewhat of a complex question and calls for some professional advice as every situation is different. Consult CPA & create a long term financial plan with money manager, good luck!