Answer:
The speaker says that the experience of going through the long journey will make the traveler wealthy.
Step-by-step explanation:
Constantine Cavafy's poem "Ithaka" is an allegorical poem about the journey of Odysseus and his decade-long journey to get back home to Ithaca. The poem draws inspiration and alludes to that epic journey, but talks more in a generalized sense of getting knowledge through the journey.
The speaker "advises" that every man must go through a journey like Odysseus in order to get to one's own "Ithaka" or in this sense, one's life end or goal. "Ithaka" here is a metaphor for the personal goal of a person/ individual. And to him, the lifelong travel through numerous 'obstacles', the memories, the experience of the journey will make the traveler wealthy.
Wise as you will have become, so full of experience,
you will have understood by then what these Ithakas mean.
According to the poet, it is not the physical wealth that will make the traveler rich but rather the experiences and life lessons he will have learned along the way, that will make him wealthy.