The fall: This happens because many investors who have been walking the bitcoin road since their low times are now in the tendency to sell and multiply their investment in the traditional currency although this monedad in some occasions tends to remain stable is there in the times You should invest to buy cheap and sell expensive once this up
Comparison with ethereum: this coin has fallen more deeply and the reason is because the ethereum has risen a lot more which generates a more stable rank in between these two currencies
Tips: it destines part of your capital only and exclusively for the world of the bitcoin being visionary thinking long term supporting these downturns that could last days or months do not despair and on the contrary sees injecting small amounts to your capital to make it bigger and bigger and Strengthen it even more
Keep in constant analysis of the market to detect those upward opportunities and be the first to enter that war of lions and thus get the most benefit to your investment
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Thanks a lot for your attention :)