Oracles have come a long way and very interesting work is being done to solve this problem. You don't always have to rely on one oracle and the amount of capita

Oracles have come a long way and very interesting work is being done to solve this problem. You don't always have to rely on one oracle and the amount of capital you'd need to 'trick' an oracle is too high to be economically advantageous. There is a possibility with very low-volume tokens, but good luck not getting eaten alive by arbitrage trying to trick a popular coin.