Altering genes can be beneficial in the long run since it could completely rid us of certain diseases or the risk for possibly getting said disease. If someone was able to take out the gene that allows people to get HIV, than we would no longer have to worry about that specific disease and the population would become healthier as a whole.
CRISPR is an abbreviation for Clustered Regularly Interspaced Palindromic Repeats. CRISPR is -in short- repeating DNA sequences.
CAS9 is an extraordinary protein that carries around a piece of DNA like a little wanted poster to find invaders. It has the ability to cut the strand the invaders are on, based on instructions that it carries, so that they can’t get in.
Biotechnology does pose some ethical risks such as the safety, whether it would put imbalance on our environment, as well as issues over the morality of those who have access to that biotechnology or etc. Although no one can guarantee that nothing will ever happen at some point, we hope to make a laws to prevent abuse of biotechnology that stop people from asking for the eye color of their children's eyes to change and other superficial things like that. We do realize that this could be a risk to mother nature but it is one of the necessary steps that we must take to further the evolution of humanity and we do it correctly there will be no harm to the environment and it might flourish even more than before.
In the near future the cost for biotechnology will most likely start out high but will later become cheaper and more accessabile by those who don't have much money.