You can if you have a certain mining power (I don't have that power rn). Just imagine with all these crazy fees rn in the memepool. What if you could have enough mining power to mine by your own (let's consider your cost of electricity is zero) and you could include only the txs you want. Yes, is a gamble, you will never know when/if your miners will find that block hash that you can construct it with your selected txs. But also you could have the luck. Mining is a lottery in the end. But also this lottery is securing the network. So no matter what, you are still securing your future money. Even with a single mining machine, you are still participating.