Is this a statement or a question?

And are you talking about haematological cancers or all cancers?

All cells have the potential to become cancerous, and over time that chance increases due to how the body/cells replicate (the more replications, the greater the chance). Therefore the older we get the greater the chance of cancer (as pointed out by Brian).

Separate from this, the body also has repair and damage limitation mechanisms in place to "control" cancer-causing mutations. When those mechanisms don't work (e.g. due to a genetic susceptibility or specific point mutation) or are overwhelmed, you get cancer growth.

So yes, we all have cancer causing cells in our bodies. The fact that they may or may not kill us is neither here nor there IMO.