We don't know what technology will come up in the next hundred years or 50 or 20 for that matter.
We just got an asteroid sample return to Earth after a 4 billion mile trip, just yesterday.
One sci fi theme is the generational ship, where people live and die and are born on a craft going maybe 10% of c. There are also stories where people are in suspended animation for a journey maybe lasting a few hundred years, all speculation but things like can come about, we just don't know yet.
I did some work on gravitational lenses and found a nice amplified light stream coming from all stars, the most interesting ones being the close and bright ones, there light gets focused into a powerful beam which I showed is a beam of amplified light that lasts for about the distance between a star and our sun, so Sirius would generate an 8 light year free ride using solar sails and the caveat is it can provide energy for that 8 light years but you better chose a light beam that goes somewhere you want to go because a straight line from Sirius and the sun, on the opposite side is a focused beam from Sirius and if there is nothing near the path you want to go to it would be a pretty useless beam to ride. Beam riders could sprout up when the science world realizes that potential.
Alpha Centauri would have it's own beam, about 4 light years long and in a totally different direction than Sirius and so forth.
Not sure how fast you could go but if it had acel of say 1/100th of a G in a long beam you would go very fast, totally guessing what kind of acceleration you could get from being a beam rider but 1% G for ten years would give you a velocity of 10 % of c and if you could crank up 10% of G, 3.2 F/sec/sec, ten years would get you near the speed of light but it it is totally speculation how much thrust a solar sail would get from such beams.