No, it isn't necessarily wrong to be wealthy, nor will wealth by itself keep us out of heaven. Some of the greatest men and women in the Bible were people of wealth (like Abraham and Job in the Old Testament). Among Jesus' most faithful followers were women of wealth who supported Jesus' band of disciples with their money (see Luke 8:3).
The Bible, however, warns us about the dangers of wealth -- and we need to take those warnings seriously. What are they? One is that money becomes like a "god" to us -- the thing we worship and serve above all else, instead of the one true God. Jesus warned, "No one can serve two masters.... You cannot serve both God and Money" (Matthew 6:24). Perhaps you've met people like this -- people who loved money above everything (and everyone) else. Don't let this happen to you!
But the Bible also warns us against the misuse of money -- using it to control others, for example, or cheat or hurt them. This too is wrong in God's eyes. Again, don't let this happen to you.
Only one thing will keep us out of heaven -- our refusal to accept God's offer of salvation in Jesus Christ. Commit your life to Him, and then ask Him to help you use your money wisely and generously, and in line with His will.